To REGROUP or not to REGROUP

Front

Would you regroup when you add the numbers 10 + 70?

Back

DON'T REGROUP

Front

Would you regroup when you add the numbers 67 + 19?

Back

REGROUP

Front

Would you regroup when you add the numbers 24 + 8?

Back

REGROUP

Front

Would you regroup when you add the numbers 9 + 20?

Back

DON'T REGROUP

Front

Would you regroup when you add the numbers 99 + 1?

Back

REGROUP

Front

What does it mean to regroup in addition?

Back

Regrouping means to carry over a value to the next place value when the sum exceeds 10.

Front

When do you need to regroup?

Back

You need to regroup when the sum of the digits in a column is 10 or more.

Front

What is an example of regrouping?

Back

In 67 + 19, you add 7 and 9 to get 16. You regroup by carrying over 1 to the next column.

Front

What is an example of not regrouping?

Back

In 10 + 70, you add 0 and 0 to get 0, and 1 and 7 to get 8. No regrouping is needed.

Front

What is the sum of 24 + 8?

Back

32, and you regroup because 2 + 8 = 10.