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3. Teacher Notes This presentation uses the term “weight” throughout. This is mainly for the benefit of primary/elementary school teachers as the younger children at primary school are not introduced to the concept of mass. Teachers who wish to use mass should simply use the Edit/Replace All command. Most of the work has focused on a 1kg scale (first 23 slides) with a variety of problems and it is likely that you will want to cover this sequentially. After this an extra 32 slides have been added that give a choice of different scales/subdivisions. There are 8 new scales each giving 4 examples. They are ½ kg, 400 g, 600 g, 800 g, 1 kg (different to the first), 2 kg, 4 kg and 5 kg. It is likely that you will want to dip in and out of these as you see fit depending on your class.

4. 1 kg 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight

5. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 400 grams Parcels

6. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 700 grams

7. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 500 grams

8. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 900 grams

9. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 450 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post. Teddies

10. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 150 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

11. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 750 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

12. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 300 grams She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

13. 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Emma recently moved to Norwich from London. 1 kg She has bought some teddy bears to send to her old friends for Christmas. Help Emma find the weight of each teddy so that she can get an idea of how much they will cost to post.

14. Group 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams a b c d e Which parcel is the heaviest and how much does it weigh? b 850 g

15. 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams a b c d e Which parcel is the lightest and how much does it weigh? e 150 g

16. 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams a b c d e How much heavier is parcel (c) then parcel (a)? 500 – 300 = 200 g

17. 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams a b c d e How much heavier is parcel (d) than parcel (e)? 250 – 150 = 100 g

18. 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams 100 200 300 400 500 600 700 800 900 0 grams a b c d e Put the parcels in order of weight, lightest to heaviest. edacb

19. Worksheet 1. 2. 3. 4. 5.

20. 300 g ? g 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 700 – 300 = 400 g Pairs

21. 400 g ? g 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 900 – 400 = 500 g

22. 400 g ? g 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 1000 – 400 = 600 g

23. 200 g ? g 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 500 – 200 = 300 g

24. 250 g ? g 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 500 – 250 = 250 g

25. 350 g ? g 100 200 300 400 500 600 700 800 900 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight Find the weight of the second object. 750 – 350 = 400 g

26. 500 g scale 100 200 300 400 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 75 grams 500

27. 100 200 300 400 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 225 grams 500

28. 100 200 300 400 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 375 grams 500

29. 100 200 300 400 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 450 grams 500

30. 400 g scale 100 200 300 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 80 grams 400

31. 100 200 300 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 160 grams 400

32. 100 200 300 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 220 grams 400

33. 100 200 300 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 340 grams 400

34. 600 g scale 150 300 450 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 120 grams 600

35. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 240 grams 150 300 450 600

36. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 330 grams 150 300 450 600

37. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 510 grams 150 300 450 600

38. 800 g scale 200 400 600 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 160 grams 800

39. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 320 grams 200 400 600 800

40. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 560 grams 200 400 600 800

41. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 720 grams 200 400 600 800

42. 1 kg scale (New) 250 500 750 1 kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 300 grams

43. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 450 grams 250 500 750 1 kg

44. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 700 grams 250 500 750 1 kg

45. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 950 grams 250 500 750 1 kg

46. 2 kg scale ½ 1 1½ 2 kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 600 g

47. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? ½ 1 1½ 2 kg 1 kg 100 g

48. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? ½ 1 1½ 2 kg 1 kg 400 g

49. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? ½ 1 1½ 2 kg 1 kg 800 g

50. 4 kg scale 1 2 3 4 kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 1 kg 200 g

51. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 2 kg 200 g 1 2 3 4 kg

52. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 2 kg 800 g 1 2 3 4 kg

53. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 3 kg 600 g 1 2 3 4 kg

54. 5 kg scale 1 2 3 5 kg 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 750 g 4

55. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 2 kg 500 g 1 2 3 5 kg 4

56. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 3 kg 250 g 5 kg 1 2 3 4

57. 0 grams 1 kilogram = 1000 grams 1 kg = 1000 g Weight How much does the parcel weigh? 4 kg 750 g 5 kg 1 2 3 4