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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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∙ 12y ago
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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.
Why do you sometimes need to regroup in 3-digit addition?
because 1 is toobig
When might i need to regroup more than one time?
With addition, you need to regroup in the event that there are more than 10 ones or 10 tens. In a subtraction, you must regroup whenever there are insufficient ones or tens to subtract.
Why do you sometimes need to regroup in 3 digit addition?
because sometimes the total is too big
Do you only need to regroup in addition if the number is greater than 9?
yes because i said so losers
When do you need to regroup?
No
When do you need to regroup in a addition problem?
When the sum of the digits you are adding is 10 or larger.
Do you need to regroup to find 73 - 35?
38
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 the ones in 48?
no
Which property allows you to regroup addends?
The commutative property of addition and the commutative property of multiplication.
Do you need to regroup on 56 plus 9?
Yes.
Do you need to regroup ones to find the product of 42 and 37?
No.
