Multi-Digit Addition and Subtraction

Front

What is multi-digit addition?

Back

Multi-digit addition is the process of adding numbers that have more than one digit, aligning them by place value (ones, tens, hundreds, etc.) and adding each column from right to left.

Front

What is multi-digit subtraction?

Back

Multi-digit subtraction is the process of subtracting numbers that have more than one digit, aligning them by place value and subtracting each column from right to left.

Front

How do you add multi-digit numbers?

Back

To add multi-digit numbers, align the numbers by their place values, start from the rightmost column, add the digits, carry over if necessary, and write the sum below.

Front

How do you subtract multi-digit numbers?

Back

To subtract multi-digit numbers, align the numbers by their place values, start from the rightmost column, subtract the digits, borrow from the next column if necessary, and write the difference below.

Front

What is carrying in addition?

Back

Carrying in addition is when the sum of a column exceeds 10, and you carry over the extra value to the next left column.

Front

What is borrowing in subtraction?

Back

Borrowing in subtraction is when you need to subtract a larger digit from a smaller digit in a column, so you take 1 from the next left column to make it larger.

Front

Example of carrying: 78 + 47 = ?

Back

125 (7+4=11, carry 1; 1+8+7=16, write 5, carry 1)

Front

Example of borrowing: 52 - 29 = ?

Back

23 (borrow 1 from 5, making it 4; 12-9=3, 4-2=2)

Front

What is the sum of 81,412 and 3,489?

Back

84,901

Front

What is the difference of 4,876 and 1,382?

Back

3,494