When the sum of the digits you are adding is 10 or larger.
because 1 is toobig
because sometimes the total is too big
When the lower digit is greater than the upper one.
3 addends mean 3 numbers. Regroup I believe means carry over. So I'm thinking something like 36+29+12=
38
because 1 is toobig
yes u can if you need too
Sure! Consider the addition problem: 27 + 46 + 35. To solve, first add 27 and 46, which equals 73. Then, you can regroup by adding the tens from 73 and 35, resulting in 70 + 5 = 75. Therefore, the total is 75.
because sometimes the total is too big
yes because i said so losers
When the lower digit is greater than the upper one.
3 addends mean 3 numbers. Regroup I believe means carry over. So I'm thinking something like 36+29+12=
No
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
38
If the total in any column exceeds nine, you will have to regroup.
no