Addition and Subtraction of Whole Numbers 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

How do you add two whole numbers?

Back

To add two whole numbers, align them by place value, add each column starting from the right, and carry over if necessary.

Front

How do you subtract two whole numbers?

Back

To subtract two whole numbers, align them by place value, subtract each column starting from the right, and borrow if necessary.

Front

What is the sum of 48 and 32?

Back

The sum of 48 and 32 is 80.

Front

What is the sum of 78 and 84?

Back

The sum of 78 and 84 is 162.

Front

What is the difference when subtracting 290 from 404?

Back

The difference when subtracting 290 from 404 is 114.

Front

What is the difference when subtracting 39 from 62?

Back

The difference when subtracting 39 from 62 is 23.

Front

What is the sum of 157 and 64?

Back

The sum of 157 and 64 is 221.

Front

What is the importance of place value in addition and subtraction?

Back

Place value is important in addition and subtraction because it ensures that numbers are aligned correctly, allowing for accurate calculations.