Multiplication Facts by 10

Multiplying by 10

When you multiply a whole number by 10, the value becomes ten times larger. A quick pattern helps: adding a 0 to the end of a whole number gives the product when the number has no decimal part.

How to work it out

1. Read the fact carefully, such as (7 \times 10).
2. Use the 10 rule: the answer is the number with a 0 added at the end.
3. Say it aloud: “7 tens is 70.” This helps connect the fact to place value.

Examples

• (3 \times 10 = 30)
• (8 \times 10 = 80)
• (12 \times 10 = 120)

Check your answer

To check, ask yourself whether the answer is ten times the original number. If you know the related fact in reverse, divide by 10: for example, (80 \div 10 = 8), so (8 \times 10 = 80).

Useful tip

Be careful to keep the number in the right place value. For whole numbers, multiplying by 10 does not change the digits’ order; it shifts the number one place to the left and leaves a zero at the end.