1. Multiplication of decimals
Saturday, April 13, 2019
Decimals
Multiplication of decimals

2. 10 9 8 80 72 = 1 5 2 1 5 2 Example Solve each of the following (a) . 1. 1 9 x 8 1 7 1 5 2 10 9 8 80 72
= 1 5 2

3. Solve each of the following (b) 4 . 2 6
Example
Solve each of the following
(b) 4 . 2 6 x 7
(c) 8 . 4 9 x 6

4. Example
Work out (a) ×16
(b) ×12
(c) ×15
(d) ×27

5. Example
Chris earns £7.05 per hour.
If he works 35 hours in a week, how much will he earn for the week?

6. Example
A factory pays workers £5.80 per hour basic, plus £8.35 per hour overtime.
If Alan works 35 hours for a basic week and 5 hours on overtime, what is his weekly salary?

7. Multiplying by powers of 10
To multiply by 10 move the decimal point one place to the right.
Example
Work out each of the following
8.532 x 10
0.083 x 10
11.76 x 10

8. To multiply by 100 move the decimal point two place to the right.
Example
Work out each of the following
8.648 x 100
0.083 x 100
x 100
9.7 x 100

9. To multiply by 1000 move the decimal point three place to the right.
Example
Work out each of the following
x 1000
x 1000
x 1000
6.2 x 1000