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How do you know if you need to regroup when finding a sum?

Anonymous

∙ 10y ago

Updated: 9/24/2023

If the total in any column exceeds nine, you will have to regroup.

Wiki User

∙ 10y ago

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Continue Learning about Math & Arithmetic

When you you multiply when do you need to regroup?

You need to regroup when you add the numbers together and they add up to a number that is ten or more. For example: 1 164 +518 _____ 682 If it is over ten, take the first digit of the number and put it above the next number. Then, add that number onto the sum of the other digits underneath it.

To find the sum of 415 -136 would you need to regroup hundreds?

551

When do you need to regroup in addition?

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

The formula for finding the sum of the angles of a polygon?

The formula for finding the sum of all angles of a polygon is: N = number of sides (N-2)180 = The sum of all angles

What is the sum of nine rule?

i have no idea but i really need to know too

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