1. Solve multi-step problems using a calculator Apply calculation techniques

2. First, be amazed… O Choose any three digit number, but each of the digits must be the same. O For example: 222 or 444

3. Now O Add up all of the digits.

4. Then O Divide the original three digit number you thought of by the total of the digits you added up.

5. Guess what? The answer is 37

6. How did I know?

7. Watch This: O 3 + 3 + 3 = 9 O 333 divided by 9 = 37. O 8 + 8 + 8 = 24 O 888 divided by 24 = 37 O The answer will always be 37!

8. Backchat - Calculators can make words as well as numbers. Turn it upside-down to read these! O 1. 31 x 7 = 2. 3859 x 2 = O 3. 1929 x 4 = 4. 179 x 3 = O 5. 1911 x 3 = 6. 49612 + 5766 = O 7. 3651 + 1986 = 8. 29611 + 8207 = O 9. 0.0123 + 0.0668 = 10. 5632 + 2082 = O 11. 66666 + 10679 = 12. 0.8968 – 0.1234 = O 13. 6311 + 1427 = 14. 0.18 + 0.19 = Calculator Fun!

9. Extension – Work out the calculations – choose the letter from a scrabble set, or laminated set of letters to crack the code! O 1 57 ÷ 3 / 64 +24 / 66 ÷ 3 / 31 – 9 / 456 – 437 / 3 x 10/ 138÷÷ 6 / 800 ÷ 100 / 12 – 6 / 930 – 911 / 89 – 47 O 2. 19 + 4 / 128 ÷ 16 / 104 – 98 / 361 ÷ 19 / 126÷ 3 96 ÷ 12 / 11 x 2 120 ÷ 4 / 373 – 365 / 408 ÷24 / 644 – 631 / 800 ÷ 100 / 306 ÷ 18 O 3. 96 – 89 / 736 ÷ 32 / 9 x 2 / 529÷ 23 / 11 x 4 / 388 – 369 / 34 – 26 / 596 – 574 / 6 x 5 / 399 – 311 / 196 ÷ 14 / 784 – 765 / 23 + 19 / 276 ÷ 12 / 188 – 145

10. Calculator word problems.

11. Aimee earns £5.90 per hour. How much does she earn a week if she works 42 hours? How will we solve this?

12. The next few slides are a bit more tricky- work in pairs or small groups. Each person should work out part of the problem. Then use your individual answers to work out the full answer together. If you need any help just ask!

13. James has £30. He spends £10 on a CD and £8.50 on a DVD. How much money does he have left?

14. Alisha has £40. She buys 3 flowerpots at £12.75 each and a spade at £9.55.How much money does she have left?

15. The temperature is 6.2 degrees. It falls 8.65 degrees. What’s the new temperature?

16. John has £97.47 He spends £44.50 on football boots and 3 footballs at £2.25 each. How much money does he have left?

17. The programmes for a concert cost 65p. Programme sales raise £852.45. How many programmes are sold?

18. David has £82.46. He buys a 2 jumpers for £23.45 each and 2 pairs of jeans for £12.99. How much money does he have left?

19. What is 28% of £234?

20. My calculator is broken! The 6 key has stopped working completely – so how can I solve the following questions? Imagine the horror: my teacher has set me lots of calculations to do on my calculator, but...

21. So, what methods could you use to solve this question? 300 – 65 Think…Pair…Share…

22. Remember, you can’t use the 6 key! 3 x 6 18 - 6 666 / 6 6.75 x 4 851 – (6x4) + 6 851 - 600 64 x 62 2600 / 4 930 / 6 36 + 46 + 6.6 Remember to record the calculations onto the talking tin lid… 75 x 65