2. Answer these quick fire questions on your mini whiteboards.

3. Multiply any integer by 10, 100 and 1000.

7. It looks like we add a zero, but really all the numbers move one place along the grid to the left.

8. Use a place value grid to help you… Thousands TH Hundreds h Tens t Units u

9. Now multiply by 100…. Now multiply by 1000…

10. How many months are there in a century? How many months in a millennium? How many weeks in a century?

11. A car costs 47p per mile to drive, How much does it cost to drive 100 miles? 1000 miles? 2000 miles?

12. A tourist stayed for 15 days in Mali. He stayed ten times longer than this in Angola. For how many days did he stay in Angola?

13. The country of Sierra Leone extends for approximately 334km from East to West. Algeria extends about ten times further. Approximately how far is Algeria from East to West?

14. Group 3: Nh7 Pg 8 Group 2: Nh7 pg 7 Group 1: Nh6 pg 4

15. One hundred multiplied by 7170 is the same as 71700 Ten lots of fifty pounds and five pence is 55 pounds. Ten pounds and ten pence multiplied by ten is one hundred and ten pounds.

16. Answer these quick fire questions on your mini whiteboards.

17. Multiply decimals by 10, 100, 1000.

18. Sam has saved £3.46; a rich uncle says he will multiply his savings by 100! How can you work out the answer?

19. Use a place value grid to help you… THhtu10ths100ths Tenths = 1/10 Tths 10ths Hundreths= 1/100 Hths 100ths

20. The decimal point does not move!

21. Deanna spent 50p a day on sweets. How much money did she spend in 10 days? 100 days? 1000 days? Can you convert from pounds to pence?

22. Jack weighed 30kg. The giant was 100 times heavier than Jack. How much did the giant weigh? Can you tell me how much the giant weighed in g?

23. The baby elephant’s trunk was 10 times longer than Bronagh’s little finger. How long was the elephant’s trunk?

24. Now multiply by 100…. Now multiply by 1000…

25. Group 3: Abacus Challenge Page 3 Group 2: Nh7 pg 35 Group 1: Abacus pg - Questions 1 -11 Page 6

26. Draw a 2 x 2 grid. Write in numbers between 10 to 50 – whole numbers only! Let’s play bingo.

27. Know addition pairs that total 100.

28. Divide integers by 10, 100, 1000.

33. 4.5 divided by 10 and dividing by ten again is the same as 4.5 divided by 100.

34. Use a place value grid to help you… THhtu10ths100ths Tenths = 1/10 Tths 10ths Hundreths= 1/100 Hths 100ths

35. The decimal point does not move!

36. Now divide by 100…. Now divide by 1000…

37. Jo’s shelf is 126cm long. She wants to put 10 boxes on this shelf. How much space will she have for each box?

38. Henri has scored 5923 runs in cricket over 100 matches. How many runs has he scored on average in each match?

39. The female giraffe ate 965 leaves and the male elephant ate ten times less. How many leaves did the male giraffe eat?

40. The population of The Gambia in Africa is approximately 1.7 million people. About ten times fewer people live in Cheshunt in the UK? Estimate how many people live in Cheshunt

41. Group 3: Abacus Challenge Page 5 Group 2: Nh7 pg 9 Group 1L Abacus pg 7

42. How many times must one hundred million be divided by 10 to get the answer of one?

43. Multiply and divide decimals by 10, 100, 1000.

44. Multiply using the grid method including decimals.

45. 89 x 123 First partition each number like this.

46. Now times where the arrows meet (where the dots are). 8000 1600 240 900 180 27

47. = 10947 Now total up all the circled numbers. = = 267 8900 1780 +

49. 4.3 x 6.2 First partition each number like this.

50. Now times where the arrows meet (where the dots are). 24 0.8 1.2 0.06

51. = Now total up all the circled numbers. = = 25.8 0.86 + 24 0.8 1.8 0.06

53. Abacus 3