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 9.

Front

What is regrouping in subtraction?

Back

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

Front

Estimate the sum of 578 + 720.

Back

1300

Front

What is the total of 231 cows and 392 cows when estimated?

Back

About 600 cows.

Front

Calculate: 600 - 85 = ?

Back

515

Front

What is the next number in the pattern: 320, 340, 360, 380, 400, ___?

Back

420

Front

What does it mean to estimate in math?

Back

Estimating means finding a number that is close enough to the right answer, often used for quick calculations.

Front

What is the sum of 45 and 37?

Back

82

Front

If you have 100 apples and give away 25, how many do you have left?

Back

75 apples.

Front

What is the difference between 150 and 75?

Back

75