Question

explain why you should record a 1 in the tens column when you regroup in an addition problem.

Answer 1

This is because only a single digit is supposed to be entered in the ones column

Answer 2

Thank you for asking this question. Here is your answer.

The regrouping is important because if you do not regroup, you will get a completely different answer.

And regrouping makes the sum equations easier.

Here is an example:

No regrouping:

 16

+ 16

--------

212

Regrouping:

 16

+ 16

--------

32

So you need to add the remaining number in the tens column in order to show that the value has increased.

If there is any confusion please leave a comment below.