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Review- (2.NBT.5) 2-digit Addition (Regrouping)

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Review- (2.NBT.5) 2-digit Addition (Regrouping)

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Addition with Regrouping Song | 2-Digit Addition For Kids

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Addition with Regrouping Song | 3-Digit Addition | 3rd-4th Grade

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How can we represent numbers?

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(Instruction/Teaching)

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Rounding to nearest 10 (video) | Khan Academy

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Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

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Use login information located under Manipulatives & More tab

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3.NBT.2 Adding 3-digits (using Place Value)

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3.NBT.2 Adding 3-digits (using Place Value)

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(Instruction/Teaching)

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Let's add 536 to 398. I'm going to do it two different ways so that we really understand what this carrying is all about. So first we'll do it in the more traditional way. We start in the ones place. We say, well, what's 6 plus 8? Well, we know that 6 plus 8 is equal to 14. And so when we write it down here in the sum, we could say, well, look, the four is in the ones place, so it's equal to 4 plus one 10 So let's write that one 10 in the tens place. And now we focus on the tens place. We have 1 ten, plus 3 tens, plus 9 tens. So what's that going to get us? 1 plus 3 plus 9 is equal to 13. Now, we have to remind ourselves, this is 13 tens. This is 13 tens. Or another way of thinking about it, this is 3 tens. This is 3 tens and 100. You might say, wait, wait. How does that make sense? Remember, this is in the tens place. When we're adding a 1 ten plus the 3 tens plus 9 tens, we're actually adding 10 plus 30 plus 90, and we're getting 130. And so we're putting the 30. The 3 in the tens place represents the 30. So this is the 3. The 3 represents the 30. And then we're placing this 1 in the hundreds place. 10 tens is equal to 100. And now we're adding up the hundreds place. 1 plus 5 plus 3 is equal to-- let's see, 1 plus 5 is equal to 6, plus 3 is equal to 9. But we have to remind ourselves, this is 900. This is in the hundreds place. So this is actually 100-- I want to make all colors the same. So this is actually 100 plus 500 plus 300. Let me get the color coding right. Plus 300 is equal to 900. And that's exactly what we got here. 100 plus 500 plus 300 is equal to 900, and we're done. This is equal to 934.

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Using place value to add 3-digit numbers: part 1 (video) | Khan Academy

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Let's add 536 to 398. I'm going to do it two different ways so that we really understand what this carrying is all about. So first we'll do it in the more traditional way. We start in the ones place. We say, well, what's 6 plus 8?

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(Instruction/Teaching)

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Place Values For Kids | Ones, Tens, Hundreds, Thousands

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Explore & Enjoy (click space below)

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A Maths Dictionary for Kids 2018 Interactive by Jenny Eather

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Interactive, animated maths dictionary for kids with over 600 common math terms explained in simple language. Math glossary with math definitions, examples, math practice interactives, mathematics activities and math calculators. © Jenny Eather 2001-2015.

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This interactive place value chart helps children develop an understanding of the value of each digit in a number. When writing numbers, the value of each digit depends on its place. Zeros are placeholders for places without a value. This manipulative place value chart offers a visual representation of ones, tens, hundreds, thousands, ten thousands, hundred thousands, and millions.

To use the chart, simply click and drag a number into the chart. Depending on where you place it, zeros will automatically appear to show the value of the number. Drag numbers around or off the chart to change the number. The interactive place value chart shows the number, composition of the number, and written number below the chart.

Students can practice placing a dictated number on the chart and confirm whether they've done so correctly by reading the written number. Alternatively, students can experiment with numbers and see how they change as they move one number from place to place.

Visit classplayground.com for more information and printables about place value.

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Place Value Chart | Virtual Manipulatives | Toy Theater

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This online interactive place value chart shows the number, composition of the number, and the written number. Use it to teach place value!

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(Instruction/Teaching)

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Learn to use regrouping, or carrying to add 709+996, 373+88, and 149+293. Created by Sal Khan.

Want to join the conversation?

What is "regrouping"? Is it the carrying of the 1s? Or is it the moving the 88 under the 373 as in the middle problem? I learned addition about 60 years ago, and the term "regrouping" wasn't used back then?
EDIT: I figured it out from the lesson on subtraction. It's both "carrying" and "borrowing". Thanks anyway! My mistake.

Regrouping is carrying of the 1's in an addition problem, and borrowing of the 1's in a subtraction problem. So regrouping in addition and subtraction problems is the exchange of 10 ones for a ten (or the reverse exchange), 10 tens for a hundred (or the reverse exchange), 10 hundreds for a thousand (or the reverse exchange), and so on.

Have a blessed, wonderful day!

1 comment Comment on Ian Pulizzotto's post "Regrouping is carrying of..."

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why is the middle one horizontal at in the video?

1 comment Comment on rayfisthebest's post "why is the middle one hor..."

Video transcript

We have three different addition problems right over here. And what I want you to do so you get the hang of things is to pause the video and try them on your own. But as you do them, I want you to really keep in mind and think about what the carrying actually means. So I assume you've tried it on your own. Now I'll work through them with you. So we have 9 plus 6. 9 ones plus 6 ones. Well 9 plus 6 is 15. Well, we can write the 5 in the ones place, and then we can carry the one. But what did we just do? W.hat does this 1 represent? Well, we put it in the tens place-- one 10 represents 10. So all we've said is that 9 plus 6 is equal to 10 plus 5. Is equal to one 10 plus 5, which is equal to 15. Now, in the tens place, we have 1 plus 0 plus 9 which is 10.. So we can write 0 and carry the 1 1 plus 0 plus 9 is 10. Now what does that really mean? Well this is 1 ten plus 0 tens plus 9 tens, which is 10 tens. 10 tens is 100. Or another way to think about 100, it's 1 hundred, and 0 tens. So that's all that carrying represents. So now we have a 1, plus a 7, plus a 9. That is going to be 17. Now we have to remind ourselves, this is in the hundreds place. This is actually 1 hundred plus 7 hundred plus 9 hundred 17 hundred. Or 1 thousand, 7 hundred. And of course we have this 5 here. And we are done. Now let's try to tackle this one. Now the reason why I wrote it that way is to make sure that we remind ourselves to align the proper places under the appropriate places. So this we rewrite as-- let me do that same green color-- we could rewrite this as 373 plus-- we want to write the ones place under the ones place, and the tens place under the tens place, so that we're adding the appropriate values. So 3 plus 8 is 11. The 1 in the ones place, and the 1 in the tens place. 10 plus 1 is 11. 1 plus 7 is 8. 8 plus 8 is 16. This is actually 16 tens. So let me just write down the 16. What is 16 tens? Well, that's 160. So this 6 is a 60, and then I have a hundred. 1 plus 3 is 4. But these are actually hundreds, so it's 4 hundreds. So we get 461. Now finally, 9 plus 3 is 12. 2 ones, and 1 ten. 12 is the same thing as 10 plus 2. Now in the tens place, 1 plus 4 plus 9 is 14. So we write the 4, and carry the 1. But remind ourselves this is actually 10 plus 40 plus 90, which is 140. Which is the same thing as 40 plus 100. And then 1 plus 1 plus 2 is 4. But this is the hundreds place. So this is actually 1 hundred, plus 1 hundred, plus 2 hundred, or 4 hundred. And we're done.

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Adding 3-digit numbers (video) | Khan Academy

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Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

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What does "Base Ten" mean?

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Hundreds, Tens, One???

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Place Value - Using Hundreds, Tens, and Ones

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(Video & Practice)

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(Instruction/Teaching)

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Rounding to the nearest 100 | 3rd grade | Khan Academy

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(Video/Practice)

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Rounding by Nearest 10 or 100 (Real World)

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Rounding by Nearest 10 or 100 (Real World)

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3.NBT.A.1 Rounding to the Nearest 10 or 100 in Real World Situations

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You've Got THIS!!

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In this free math game for kids, students can practice rounding numbers to tens, hundreds, and thousands! They can also practice rounding decimals. Players choose the level of difficulty they want to play, depending on the types of numbers they want to round to. Players round the numbers up or down to find the answer.

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You're a Rounding Master!!!

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This interactive math lesson gives students the opportunity to practice rounding numbers to the nearest ten. The students will round numbers up to 99. Several question formats are presented in this entertaining, yet educational, math game. One math question asks students to drag and drop numbers into the correct column to show which numbers round to 70 or 80, for example. In another type of question, students need to fill in a number that rounds to the nearest ten for the given number. Another question format will help kids with rounding to the nearest ten by asking which multiple choice answer rounds to the number given. There are also word problems in this lesson that ask students to round to the nearest ten for a given number.

Students are given a limited amount of hints in this rounding math activity. The hints remind students to look at the ones place. If the number is five or more, round up. If the number is less than five, round down. When a student has used up all his or her hints, the hint window will display this in a message.

Perhaps one of the most invaluable components of this rounding lesson for kids is the detailed explanation that appears when a student gets the answer wrong. Each explanation tells students to look at the ones place to determine whether to round up or round down. If the question is a multiple choice question, the explanation breaks down which answers round up and which ones round down.

When students are immersed this multiplying decimals math activity, they will feel like they are playing a fun, challenging math game. Teachers will see each I Know It lesson as an invaluable opportunity for their students to practice basic math skills. It's a win-win for students and teachers alike! You'll love the kid-friendly interface in this interactive math lesson. The questions are displayed in an easy-to-read format. The hint button is just a click away. In the upper-right corner of the screen, a progress icon tells students how many questions they've answered in the lesson. Below the progress icon, a score-keeper lets students know how many points they've accumulated so far as they solve the decimal multiplication questions correctly.

This math activity definitely doesn't feel like math practice when kids are engaged in the rounding to the nearest ten questions! Students think they are playing a fun and challenging math game, while teachers see the benefits of interactive math practice that they can use to monitor their students' progress in rounding to the nearest ten. The interface is very user-friendly and tailored to kids. The hint button in the lower-left corner of the screen is easily accessible. A score-keeper in the upper-right corner of the screen lets students know how many points they've accumulated so far in the lesson. The progress icon above the score-keeper tells students how many questions they've completed in the math lesso

You have the opportunity to try out I Know It before you purchase a membership. You can preview any lesson for free; however, the number of questions you have access to is limited until you become a member of the website.

Did you know that I Know It also features administrative tools for teachers? That's right! Teachers can create student logins, view their students' scores for completed lessons, adjust lesson settings, and access student progress reports.

Teachers also have flexibility in assigning lessons based on the the individual needs and skill level of their students. That's because grade levels are alternately referred to as "Level A," "Level B," "Level C," instead of "1st Grade," "2nd Grade," "3rd Grade," etc. Students won't know the lesson they're working on is associated with a specific grade level, and teachers can make sure the skill is suited to the child's ability.

We are eager for you and your students to try out this dynamic math activity in your rounding lesson. Will you give it a try today? Rounding to the nearest ten is amazingly fun on I Know It! While you're at it, remember to sample more of our second grade math games.

We've categorized this math activity for rounding to the nearest ten as a Level B lesson. It may be appropriate to use at a first grade, second grade, or third grade level.

2.NBT.4
Number and Operations in Base Ten: Understand Place Value
Students should be able to compare two three-digit numbers based on their understanding of the hundreds, tens, and ones digits, using the symbols >,

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Round numbers to the nearest ten. Each questions includes hints and easy-to-understand explanations. When you answer correctly, an animated character dances.

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You've got THIS!!

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Subtraction With Regrouping Song | Subtraction Rap for Kids

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Happy singing!!!

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Place Value Song For Kids | Ones, Tens, & Hundreds | 1st - 3rd Grade

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(Worksheet)

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Place Value Understanding

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ABCya! * Base Ten Fun - Learning Place Value

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Base Ten Fun helps kids understand place value, addition and subtraction through the use of virtual manipulatives. Kids can choose a game mode depending on their desired level of difficulty, and also select place value options of ones, tens and hundreds. As a fun bonus, children can select different snake styles when they answer 10 questions correctly!

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Adding Whole Numbers...R U Ready?

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Problem Solving
Number Sense

Common Core Connection for Grades 2 and 3

Represent and solve problems involving addition and subtraction.
Add and subtract within 100.
Use place value understanding and properties of operations.

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Captain Plus and the SumBots | Math Playground

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Play Captain Plus and the SumBots at MathPlayground.com! Solve number puzzles to win the game.

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Number Detectives

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Number Detective - Place Value Game | Turtle Diary

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Number Detective gives exactly what it promises. You get to play a detective! You are given some clues at the bottom screen which you have to decode to find out

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Place Value Penguins

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Pop Penguin and the Place Value Race | Math Playground

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Play Pop Penguin and the Place Value Race at MathPlayground.com! Solve number and place value puzzles to win the game.

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Space Jaunt

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Mental Math - rounding whole numbers
Problem Solving - number sense

Common Core Connection for Grades 2 and 3

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones.
Use place value understanding to round whole numbers to the nearest 10.

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Space Jaunt | Rounding | Math Playground

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Play Space Jaunt at Math Playground! Round 3 digit numbers to the nearest 10 and win the race.

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The value of a digit depending on its place in a number.

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A tool that helps us count numbers to 100.

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A counting number from zero to infinity.

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Any number used to get the sum or total.

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a number system that uses the digits 0-9 to create all numbers

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making a number simpler but keeping its value close to what it was at first.

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the process of combining 2 or more numbers to find a sum or total.

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the process of taking a number away from another number to find a difference.

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Moving an amount (usually 10) from one place to another so it is easier to calculate the difference.

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Skip Counting by 2 Song | For 1st Grade & 2nd Grade Teachers

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Multiply by 3 | Learn Multiplication | Multiply By Music | Jack Hartmann

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Skip Counting by 4 Rap Song | Dance the 4 Times Tables

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5 Times Table Song | Skip Counting by 5 Rap For Kids

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Skip Counting by 6 Rap Song | Dance the 6 Times Tables

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Multiply by 8 | Learn Multiplication | Multiply By Music | Jack Hartmann

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Skip Counting by 9 Song | Counting Up by Multiples of 9

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(Instruction/Teaching)

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Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

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Click on the purple octopus to begin!!

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Deep Sea Duel Instructional Guide
Object of the Game

In the 9-bubble game, the object is to choose numbers so that the sum of any three of them is equal to the specified sum.

In the 16-bubble game, the object is to choose numbers so that the sum of any four of them is equal to the specified sum.

Number of Players: Play against Okta or a friend.

Number of Bubbles: Choose either 9 or 16 bubbles.

Complexity: Negative numbers and/or decimals are an option to increase the difficulty of the game.

Language: Choose between English or Spanish.

Settings

During the game, you and your opponent will take turns selecting cards. The first one to get the specified sum with three cards (in the 9‑card game) or four cards (in the 16‑card game) wins the game. The sum to be obtained will be shown on the seashell in the top center of the game.

A running total of the number of wins will be kept. Ties are not recorded.

The Help clam can be used to see these object of the game. The Settings button will allow you to change the type of game you want to play.

During the Game

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This strategy game requires you to select cards with a specified sum before your opponent (also available on iOS and Android).

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Practice

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grade 3  free math games practice common core standards

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(Rounding/Estimating)

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ABCya! * Number Chart - Use to Learn Number Patterns & More

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The interactive number chart is a great way for students to discover number patterns, skip count, and learn multiplication tables. Color the interactive number charts to find patterns in numbers or use them for counting exercises. Children can print their charts too!

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username: hespop
password: hespop1

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username: hespop
password: hespop1

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BrainPOP - Animated Educational Site for Kids - Science, Social Studies, English, Math, Arts & Music, Health, and Technology

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Use login information located under Manipulatives & More tab

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Use login information located under Manipulatives & More tab

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You've Got THIS!!

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Subtraction with Regrouping (BrainPOP Jr.)

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Subtraction with Regrouping (BrainPOP Jr.)

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Use login information located under Manipulatives & More tab

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BrainPOP Jr. - Animated Educational Site for Kids - Science, Social Studies, English, Math, Arts & Music, Health, and Technology

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Feel free to download, print, & use

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Grade 3 Rounding Roller Coasters Project

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ABCya! * Virtual Manipulatives - Fraction, Percent & Decimal Tiles

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Virtual Manipulatives: Fraction, Decimal & Percent Tiles is a fun way for students to explore and understand how parts make up a whole. Let Dottie the Worm help kids better comprehend various math concepts while working with colorful blocks and tiles!

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Choose your topic...HAVE FUN!!

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QR CODE

Scan this on mobiles and tablets to quickly open this web page.

Hit the Button is an interactive maths game with quick fire questions on number bonds, times tables, doubling and halving, multiples, division facts and square numbers. The games, which are against the clock, challenge and develop mental maths skills. An untimed, practise mode is available in our Hit the Button app along with lots more extra features.

The activities can be matched to appropriate mathematical ability. Regular use of Hit the Button can help students to sharpen their recall of vital number facts in a fun way and learning multiplication tables need not be boring.

AGE

6-11 Years

SUBJECTS

Maths Times Tables Division Number Bonds Doubles Halves Square Numbers

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Hit the Button - Quick fire maths practise for 6-11 year olds

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Quick fire questions on number bonds, doubles, halves, times tables, division facts and square numbers against the clock. Superb!

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WOW!!!