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Q: When do you need to regroup hundreds in a subtraction problem?

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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.

It is still a subtraction problem.

yes u can if you need too

You need to regroup when you have something like 46-39. You would cross out the 6 and make it a 16, because you are taking ten from the 4, then you cross out the 4 then make it a three, then you should get 7.

No

you need to regroup when the bottom number is bigger than the top number

551

108

no

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

38

Yes.

When the sum of the digits you are adding is 10 or larger.

No.

Yes.

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

because 1 is toobig

First, you need to figure out what 30% of 79.99 is. To to this you need to multiply: 79.99 x 0.3 = 23.997, which you can round to 24.00 Now the problem has become a very simple subtraction problem: 79.99 - 24.00 = 55.99

No idea sorry bud.

yes

No. It depends on how good you are at arithmetic.

No, you don't move the decimal in subtraction. However, you may need to add trailing zeroes after the decimal in order to make subtraction easier.

Depends on what kind of problem you are calculating? ((You need to be a little more specific)) There are many different types of problems you could be solving: division, subtraction, addition, fractions, percentages, etc.

No, you need a miracle! 73 does not equal 35 and no amount of regrouping will alter that.

913 -426 Since the 6 is larger than the 3 and the 2 is larger than the 1, you will have to regroup two times.

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