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Regrouping Decision Inspector

Yes or No

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About this activity

Yes/No: regrouping in subtraction

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Lebanon

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Regrouping Decision Inspector
 

Regrouping Decision InspectorOnline version

Yes/No: regrouping in subtraction

by Hidden Author
1

Regrouping keeps the total value of the top number the same.

2

51 − 27 needs regrouping.

3

41 − 18 needs regrouping.

4

32 − 15 = 17.

5

After regrouping, subtract the ones before the tens.

6

If the top ones digit is greater than the bottom ones digit, regrouping is always required.

7

34 − 12 needs regrouping.

8

When regrouping, borrow 1 ten and add 10 to the ones.

9

Regroup when the top ones digit is smaller than the bottom ones digit.

10

25 − 19 needs regrouping.

11

In 32 − 15, regrouping changes 32 into 2 tens and 12 ones.

12

53 − 14 = 39.

13

In 53 − 14, 3 ones are enough to subtract 4 ones without regrouping.

14

46 − 33 needs regrouping.

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