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If the only operation you are working with is addition you don't need to. However, if dealing with a long list of numbers, it may be useful to regroup into tens and hundreds and other "round numbers" that you can sum together quickly at the end.
For example 12 + 26 + 88 + 74
= 12 + 88 + 26 + 74 = (12 + 88) + (26 + 74) = 100 + 100 = 200
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Earn +20 ptsQ: When do you need to regroup in addition?
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Continue Learning about Math & Arithmetic
When do you need to regroup?
No
How do you know if you need to regroup when finding a sum?
If the total in any column exceeds nine, you will have to regroup.
Do you need to regroup on 56 plus 9?
Yes.
Do you need to regroup ones to find the product of 34 and 3?
Yes.
When was Regroup created?
Regroup was created in 2006.
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