START

1. FINISH START

2. Rounding

3. To be able to round numbers in everyday life to different degrees of accuracy. aim Your

4. I will be able to calculate prices and check them using rounding. I will be able to timetable treatments using approximate durations. Your objectives

5. If you asked a policeman the time and he said it is 31 seconds past 11: 10 AM on the 15thday of October in the year 2013 AD. • Too much information? • 10 past 11 is accurate enough. • So it’s about how accurate you need to be.

6. Practice – round to whole numbers £32.27 £256.74 £107.49 £32 £257 £107 £12.99 £34.14 £22.54 £13 £34 £23

7. Practice – round to nearest ten £132.27 £256.74 £107.49 £130 £260 £110 £12.99 £34.14 £1025.54 £10 £30 £1030

8. Practice – round to nearest hundred £132.27 £256.74 £107.49 £100 £300 £100 £252.99 £234.14 £955.54 £300 £200 £1000

9. You have won a local radio contest giving you four thousand pounds to spend at Argos. Your task is to spend a maximum of £4000 buying items for your newly decorated bedroom. You are allowed to buy anything you like (plan your dream room), but you must make note of the actual price then round it up to keep a check of the cost. Round prices under £10 to the nearest pound, items up to £999 to the nearest £10 and £1000 up to the nearest £100. So for example for that lava lamp which you have always wanted, it may cost £17.99 you would round it up to the nearest ten pound, so £20.

10. Decimal place 123 456 . 7890 4th decimal 2nd decimal 3rd decimal 1st decimal

11. Practice – round to 1 decimal place 32.27 256.74 107.491 32.3 256.7 107.5 £12.99 £34.14 £22.56 £13.00 £34.10 £22.60

12. Significant figure 15 499 45 379 123 456 0.135 24 999 23 123 0.0987 25 499 17 898

13. Practice – round to 1 significant figure 32.27 256 0.0567 0.06 30 300 £1 299 25 499 1.70m £1 000 30 000 2m