2. Using exponents on the calculator Depending on your calculator you will use one of the following buttons. xyxy 10 x EXPEE  (you may have to use the shift button) Enter the 5.4x10 3 into your calculator Calculator Keys 5 4 x xyxy 0 3 1

3. 4 x xyxy 0 1 6 ( ( x xyxy 0 ) 1 68) x Calculate: 4 x 10 6 ÷ 8 x 10 6 It is good practice to put each value in brackets

4. Using the calculator Example 2:Express as a decimal 5 = 10 0.5 = 1┌21┌2 Example 3:Express as a mixed number 7 4 = 1 ┌ 3 ┌ 4 Fractions

5. 5 Using the calculator We can use the calculator when working with fractions The fraction button is : Example 1:Express as a decimal 3 = 4 0.75 Fractions

6. Using the calculator Example 4:Express as a improper fraction 4 2 = 14 ┌ 3 3 2nd Example 5:Add 4 3 + 5 ┌ 4 ┌ 15 523= Fractions