Adding with regrouping

Front

What is adding with regrouping?

Back

Adding with regrouping is a method used when the sum of two digits in a column is 10 or more. You carry over the extra value to the next column.

Front

What do we do when we add 8 and 7?

Back

When adding 8 and 7, we get 15. We write down 5 and carry over 1 to the next column.

Front

What is the first step in adding with regrouping?

Back

The first step is to line up the numbers by their place values (ones, tens, etc.).

Front

If we add 9 + 6, what do we do?

Back

9 + 6 equals 15. We write down 5 and carry over 1 to the next column.

Front

What does 'regrouping' mean?

Back

Regrouping means to rearrange numbers when their sum exceeds 9, moving the extra value to the next column.

Front

How do you add 27 + 36 using regrouping?

Back

First, add the ones: 7 + 6 = 13. Write down 3 and carry over 1. Then add the tens: 2 + 3 + 1 = 6. So, 27 + 36 = 63.

Front

What is the sum of 45 + 28?

Back

45 + 28 equals 73. Add the ones: 5 + 8 = 13 (write 3, carry 1). Add the tens: 4 + 2 + 1 = 7.

Front

What happens if the sum of the ones is less than 10?

Back

If the sum of the ones is less than 10, you write it down without carrying over.

Front

What is an example of a problem that requires regrouping?

Back

An example is 58 + 37. The ones add up to 15, so you write down 5 and carry over 1.

Front

What do you do with the carry-over number?

Back

You add the carry-over number to the next column's sum.