Addition and Subtraction with Regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is the process of carrying over a value from one column to the next when the sum of a column exceeds 10.

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is the process of borrowing from the next column when a digit in the top number is smaller than the digit in the bottom number.

Front

What is the sum of 12 and 15?

Back

27

Front

What is the difference between 20 and 8?

Back

12

Front

How do you estimate the sum of 546 and 53?

Back

Round 546 to 550 and 53 to 50, then add: 550 + 50 = 600.

Front

What is the first step in adding 638 and 345?

Back

Align the numbers by place value: 638 + 345.

Front

What do you do if the sum of a column is greater than 9?

Back

You regroup by carrying over to the next column.

Front

What is the estimated sum of 359 and 481?

Back

Round 359 to 360 and 481 to 480, then add: 360 + 480 = 840.

Front

What is the process of rounding to the nearest ten?

Back

Look at the digit in the ones place; if it's 5 or more, round up; if it's less than 5, round down.

Front

What is 424 + 277?

Back

701