divisiones by Jesús Zárate https://padlet.com/jesus_zarate/il5mnoq7mxex Hecho con la ayuda de un mono mecanógrafo en-us 2017-10-04 15:59:25 UTC 2017-10-04 16:08:44 UTC hello@padlet.com Two-Digit Divisor in Long Division jesus_zarate https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193941035 This is a complete lesson with examples and exercises about two-digit divisor in long division, meant for initial teaching in 5th grade. The first exercises have grids to complete the division, and space for students to write the multiplication table of the divisor in the margin. Then there are conversion problems between inches/feet and ounces/pounds, because those are solved with division.

Often, it is helpful to write the multiplication table of the divisor before you divide.
Example 1. The division is by 16. Here is the multiplication table of 16:3 × 16 = 48
4 × 16 = 64
5 × 16 = 80
6 × 16 = 96
7 × 16 = 112
8 × 16 = 128
9 × 16 = 144 |   |   | 0  3
16  | )  | 5  5  6  816 goes into 5 zero times, so we look at 55.How many times does 16 go into 55?Check in the table on the left. We see it goes into 55 three times. |   |   | 0  3  4
16  | )  | 5  5  6  8
  | - | 4  8
  |   |     7  6 Now, how many times does 16 go into 76?From the table we can see that it is four times. |   |   | 0  3  4  8
16  | )  | 5  5  6  8
  | - | 4  8
  |   |     7  6
  |   |  -  6  4
  |   | 1  2  8
  |   |   - 1  2  8
  |   | 0Lastly, 16 goes into 128 exactly 8 times, and the division is over.
Example 2. We are dividing by 32. Here is the multiplication table of 32:3 × 32 = 96
4 × 32 = 128
5 × 32 = 160
6 × 32 = 192
7 × 32 = 224
8 × 32 = 256
9 × 32 = 288 |  |  | 0  1
32  | ) | 4  7  0  7 
  | - | 3  2
  |   | 1  5 
 
32 goes into 47 once. |  |  | 0  1  4
32  | ) | 4  7  0  7 
  | - | 3  2
  |   | 1  5  0
  | - | 1  2  8
  |   |     2  2 32 goes into 150 four times. |  |  | 0  1  4  7
32  | ) | 4  7  0  7
  | - | 3  2
  |   | 1  5  0
  | - | 1  2  8
  |   | 2  2  7
  |   |  - 2  2  4
  |   | 332 goes into 224 seven times. Notice there is a remainder.
]]> 2017-10-04 16:01:35 UTC https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193941035 mental math jesus_zarate https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193942926 4. Mental math! If 20 goes into 800 forty times, then 20 goes into 820 one time more,
    or 41 times. In each box, use the top problem to help you solve the bottom problem.

a. 800 ÷ 20 =     820 ÷ 20 = | b. 700 ÷ 50 =     750 ÷ 50 =  | c. 150 ÷ 15 =    300 ÷ 15 =
d. 480 ÷ 40 =     520 ÷ 40 = | e. 600 ÷ 30 =     690 ÷ 30 =  | f. 1,200 ÷ 60 =    1,320 ÷ 60 =
]]> 2017-10-04 16:04:15 UTC https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193942926 divisions jesus_zarate https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193945372 Below is the process written out in full.
You will often see other versions, which are generally just a shortened version of the process below.
You can also see this done in Long Division Animation.
Let's see how it is done with:
  • the number to be divided into is called the dividend
  • The number which divides the other number is called the divisor

]]> 2017-10-04 16:07:36 UTC https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193945372 divisions jesus_zarate https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193946056 And here we go:
| 4 ÷ 25 = 0 remainder 4 | The first digit of the dividend (4) is divided by the divisor.
|   | The whole number result is placed at the top. Any remainders are ignored at this point.

| 25 × 0 = 0 | The answer from the first operation is multiplied by the divisor. The result is placed under the number divided into.
| 4 − 0 = 4 | Now we subtract the bottom number from the top number.
|   | Bring down the next digit of the dividend.
| 42 ÷ 25 = 1 remainder 17 | Divide this number by the divisor.
|   | The whole number result is placed at the top. Any remainders are ignored at this point.

| 25 × 1 = 25 | The answer from the above operation is multiplied by the divisor. The result is placed under the last number divided into.
| 42 − 25 = 17 | Now we subtract the bottom number from the top number.
|   | Bring down the next digit of the dividend.
| 175 ÷ 25 = 7 remainder 0 | Divide this number by the divisor.
|   | The whole number result is placed at the top. Any remainders are ignored at this point.

| 25 × 7 = 175 | The answer from the above operation is multiplied by the divisor. The result is placed under the number divided into.
| 175 − 175 = 0 | Now we subtract the bottom number from the top number.
]]> 2017-10-04 16:08:37 UTC https://padlet.com/jesus_zarate/il5mnoq7mxex/wish/193946056