Three-Digit Addition and Subtraction Flashcard

Front

What is three-digit addition?

Back

Three-digit addition is the process of adding numbers that each have three digits, where you align the numbers by place value (hundreds, tens, and units) and sum them column by column.

Front

What is three-digit subtraction?

Back

Three-digit subtraction is the process of subtracting one three-digit number from another, where you align the numbers by place value and subtract them column by column.

Front

What does it mean to regroup in addition?

Back

Regrouping in addition refers to the process of carrying over a value from one column to the next when the sum of a column exceeds 9.

Front

What does it mean to regroup in subtraction?

Back

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

Front

How do you add two three-digit numbers?

Back

To add two three-digit numbers, align them by place value, start from the rightmost column, add the digits, carry over if necessary, and continue to the left.

Front

How do you subtract two three-digit numbers?

Back

To subtract two three-digit numbers, align them by place value, start from the rightmost column, subtract the digits, borrow if necessary, and continue to the left.

Front

What is the sum of 456 and 378?

Back

The sum of 456 and 378 is 834.

Front

What is the result of 567 plus 289?

Back

The result of 567 plus 289 is 876.

Front

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

Back

Place value is crucial in addition and subtraction as it determines the value of each digit based on its position, ensuring accurate calculations.

Front

What is a common mistake when adding three-digit numbers?

Back

A common mistake is failing to carry over when the sum of a column exceeds 9.