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Same But Different is a powerful routine for use in math classrooms. The images can be used for teaching a way of thinking: grayscale thinking, categorical thinking; helping students to build a network of ideas and an approach for learning and thinking about mathematics.

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Would You Rather Math – ASKING STUDENTS TO CHOOSE A PATH AND JUSTIFY IT WITH MATH

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Teachers, sign up for my mini-workshop to learn about how to implement Would You Rather Math into your classroom routines. We will explore some sentence frames, what happens when things don’t go as planned, how to use the prompts in a remote learning setting, and much more. See you there!

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/en/decimals/adding-and-subtracting-decimals/content/

Multiplying with decimals

In Adding and Subtracting Decimals, you learned how to add decimal numbers. You may be able to think of times when you'd add decimals in real life. For example, let's say you go to the store and find a shirt you really like. The price tag says it costs $15.60. You like the shirt so much that you decide to buy five of them.

To figure out the total cost, you could add the prices.

Adding this many numbers could take a long time. In the lesson on multiplication, we learned that when you multiply, you are increasing a number many times. Because all of the shirt prices are the same, multiplication could help you solve this problem a little faster.

When you multiply decimal numbers, it's helpful to set up the problem in a way that makes it easier for you to solve it one step at a time.

Click through the slideshow below to learn how to set up a multiplication problem with decimals.

Solving multiplication problems with decimals

Multiplying decimal numbers is a lot like multiplying larger numbers. If you divide the large problem into a few smaller ones, it will be easier to solve. Let's see how this works by solving this problem: 2.3 x 4.

Click through the slideshow to learn how to multiply decimals.

Note: When determining where to place your decimal point in your answer, count the total number of digits to the right of each decimal point in your problem. For example, if you are simplifying 3.25 x 2.3, you would count the two digits in 3.25 plus the one digit in 2.3. Therefore, we should place the decimal point in our answer so that three digits are to the right (3.25 x 2.3 = 7.475).

Try This!

Try solving these multiplication problems. Then, check your answer by typing it in the box.

Dividing decimals

Let's look at a different situation. Let's imagine you have a fence, and you want to plant 5 bushes in front of it. Your fence is 20 feet long. You'd like to space the bushes out equally, so you know you'll need to divide your fence into 5 equal sections. This means you'll need to divide 20 by 5.

In the lesson on division, we learned how to set up division expressions. For the situation above, the expression would look like this:

In our expression, 20 is a whole number. But what if the length of the fence is a decimal number? For instance, let's say it's 20.75 feet long. Believe it or not, dividing a decimal isn't that different.

When you set up an expression to divide a decimal number, it's important to make sure you're always dividing by a whole number. In our example above, 20.75 is being divided by the whole number 5. Dividing by a whole number makes long division easier to manage.

Click through the slideshow below to learn how to set up division problems with decimals.

Dividing decimal numbers

In the previous slideshow, you practiced setting up division expressions with decimal numbers. Let's take a closer look at how to divide a decimal. Dividing a decimal number is a lot like dividing a whole number. There's just one extra step at the end.

Click through the slideshow to learn how to divide decimals.

Try This!

Find the quotient for each of the long division problems below. Check your answer by typing it in the box.

/en/decimals/converting-percentages-decimals-and-fractions/content/

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Decimals: Multiplying and Dividing Decimals

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en/decimals/adding-and-subtracting-decimals/content/ In Adding and Subtracting Decimals, you learned how to add decimal numbers. You may be able to think of times when you'd add decimals in real life. For example, let's say you go to the store and find a shirt you really like. The price tag says it costs $15.60.

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Hands-On Math Goes Digital In and Beyond the Classroom!

Explore Our Collection of FREE Virtual Manipulatives

From Number Lines to Base Ten, Pattern Blocks to Place Value, Disks our collection of free Virtual Manipulatives gives educators and families access to visual and hands-on digital resources that lead to understanding. Students can use these resources in class and at home to practice math concepts, reinforce their growing math understanding, technology they love in the process.

Free Resources & Instructions for Teachers and Families

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Demonstrate key math concepts in your classroom using our new virtual manipulatives!

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This is Which One Doesn't Belong?, a website dedicated to providing thought-provoking puzzles for math teachers and students alike. There are no answers provided as there are many different, correct ways of choosing which one doesn't belong. Enjoy!

Which One Doesn't Belong?

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This is Which One Doesn't Belong?, a website dedicated to providing thought-provoking puzzles for math teachers and students alike. There are no answers provided as there are many different, correct ways of choosing which one doesn't belong. Enjoy!

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Ten Frame
Hundred Chart
120 Chart
Number Line
2 Color Counters
Base Ten Blocks
Square Tiles
Unifix Cubes
Dice
Spinner

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Session Number: e
Instructor: Shaketa Gillard

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•Choose to be present.

•Be an active listener and part of the discussion.

•Encourage each other.

•Understand that learning is a process, not an event.

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Code:
Subject: Math
Program: Math Solutions

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Search by entering a portion of your Site Location Name and Zip/Postal below, then click the Search button. Results will display in the Site Name field, click the drop-down arrow to select your institution. Note: If zip/postal code is not known, you can also search by City and State.