Addition/Subtraction with and without regrouping

Front

What is addition?

Back

Addition is the mathematical operation of combining two or more numbers to get a total or sum.

Front

What is subtraction?

Back

Subtraction is the mathematical operation of taking one number away from another to find the difference.

Front

What does regrouping mean in addition?

Back

Regrouping in addition refers to the process of carrying over a value from one column to the next when the sum exceeds the base value (e.g., 10 in base 10).

Front

What does regrouping mean in subtraction?

Back

Regrouping in subtraction involves borrowing from a higher place value when the top digit is smaller than the bottom digit in a column.

Front

How do you add two-digit numbers without regrouping?

Back

To add two-digit numbers without regrouping, simply add the digits in each place value column separately, ensuring the sum is less than 10.

Front

How do you add two-digit numbers with regrouping?

Back

To add two-digit numbers with regrouping, add the digits in the ones place first, carry over if the sum is 10 or more, then add the tens place.

Front

How do you subtract two-digit numbers without regrouping?

Back

To subtract two-digit numbers without regrouping, subtract the digits in each place value column directly, ensuring the top digit is larger than the bottom.

Front

How do you subtract two-digit numbers with regrouping?

Back

To subtract two-digit numbers with regrouping, borrow from the next higher place value when the top digit is smaller than the bottom digit.

Front

What is the sum of 246 and 553?

Back

The sum of 246 and 553 is 799.

Front

What is the difference between 974 and 621?

Back

The difference between 974 and 621 is 353.