2. Powers of 10 10 4 10 3 10 2 10 10000 100 1000 1010.1 0.01 Subtract 1 from the powerAdd 1 to the power Multiply by 10Divide by 10 10 0 10 -1 10 -2 1

3. Multiplication always makes numbers bigger Division always makes numbers smaller TRUE OR FALSE?

4. Calculator Challenge 1 In your envelopes you will find: A starting number A target number In pairs, take it in turns to multiply your starting number by any number you choose Can you make your target number by only multiplying? Closest to the target number wins.

5. Try multiplying and dividing the numbers on the left hand side by those on the right hand side. 0.1 1/100 0.01 10 100 1/10 0.6 25 0.23 62.5 0.00482 800 0.09 1.5 Investigate x ÷

6. Organise your findings into a table: MultiplyDivide 0.11/10100.01 1/100 1000.11/10100.01 1/100 100 x y

7. What can you see? MultiplyDivide 0.11/10100.01 1/100 1000.11/10100.01 1/100 100 0.00482 0.09 0.23 0.6 1.5 25 62.5 800

8. Calculator Challenge 2 In pairs, choose a starting number between 1 and 20. Choose a target number between 100 and 200. Take it in turns to divide your starting number. Can you make your target number by only dividing? Closest to target number wins.

9. Dividing by a number less than 1 makes things bigger

10. Multiplying by Dividing by 0.1 0.01 Is the same as Dividing by Multiplying by 0.1 0.01 Is the same as 1/10 1/100 10 100 1/10 1/100100 10

11. Multiplying and dividing by powers of 10 7.34 x 100 = 734 37.4 / 10 =3.74 9.3 x 0.1 =9.3 / 10 =0.93 0.27 / 0.1 =0.27 x 10 =2.7 0.63 x 0.01 =0.63 / 100 =0.0063 5.96 / 0.01 =5.96 x 100 =596

12. Multiplying by a number less than 1 makes things smaller. Dividing by a number less than 1 makes things bigger