1. Multiplying a number by 10
Baa
Multiplying a number by 10
What do we need to do?
Helen Morris March 2008

2. 4 3 When multiplying by 10 43 x 10 = 430 H T U
Simply move the digits one place to the left H T U
Add a zero to hold place value! 4 3
When multiplying 43 by 10. What does the 40 become? What does the 3 become? Each value has become 10 times bigger. The digits move one place to the left and the zero is added to keep place value. 43 x 10 is 430
43 x 10 =
430

3. Let’s try with a decimal number. H T U t 1 4 3 .
The same method applies when multiplying a decimal by 10. All digits move one place to the left. The decimal place doesn’t move. In the case 1tenth becomes 1 unit. It has become 1-0 times bigger. What will the 3 become? What will the 40 become?
43.1 x 10 =
431

4. Have a go. H T U
Insert your own numbers.
x 10 = ? ?

5. Have a go with multiplying a decimal number by 10.
Insert you own numbers. .
x 10 = ? ?

6. Well Done !