This is the presentation made to 200 parents in Raffles Girls' Primary School in Singapore. It was organized by the alumni members.

1. Using The Model Method to Solve Word Problems DrYeap Ban Har Marshall Cavendish Institute Singapore Slides are available at www.banhar.blogspot.com CollegioDagoberto Godoy, Santiago de Chile

2. The Curriculum (Ministry of Education 2006)

3. emphasis thinking The Curriculum (Ministry of Education 2006)

4. emphasis visualization

7. Experiencing Singapore Math

9. Experiencing Singapore Math

10. Experiencing Singapore Math

13. Kyla ? $28 – $9 = $19 Kyla has $19. Jake ? $9 $28

14. Ming 48 Naomi 48 ÷ 4 = 12 3 x 12 = 36 Ming has 36 candies.

15. 15 3 units  15 18 units  6 x 15 = 90 apples There are 90 fruits in the basket.

16. Method 1 3 units  15 18 units  6 x 15 = 60 + 30 = 90 18 units  6 x 15 = 3 x 30 = 90 Method 2 3 units  15 1 unit  5 18 units  18 x 5 = 50 + 40 = 90 18 units  18 x 5 = 180 ÷ 2 = 90

17. Allan’s allowance = 4 x $8 = $32 $24 ÷ 3 = $8 $6 $18

18. Mon Tue $3 $100 Wed $3 $3 Thu $3 $3 $3 $100 – 6 x $3 = $82 $82 ÷ 4 = $20.50 $20.50 + 3 x $3 = $29.50 She saved $29.50 on Thursday.

19. adults children 2 units  380 – 260 = 120 1 unit  60 260 – 60 = 200 200 + 200 = 400 400 people left at lunchtime.

20. apples 90 oranges 38 pears 15

21. apples 90 oranges pears 15 23

22. 90 + 15 = 105 5 units  1 unit  105 ÷ 5 = 21 There were (21 + 21 + 23) apples, hence oranges. There were 44 oranges used. apples ? oranges pears 15 23

23. What if we have drawn 38 to be much longer? apples 90 oranges 38 pears 15

24. What if we have drawn 38 to be much longer? apples 105 oranges 38 pears We still get 5 units  105

25. One other way to solve it … Number of oranges left = x Number of apples left = 2x Number of pears left = 2x – 15 x + 2x + 2x – 15 = 90 5x = 105 x = 21 Number of pears left = 2 x 21 – 15 = 27 Number of pears at first = 38 + 27 = 65 Number of oranges at first = 65 Number of oranges used = 65 – x = 65 – 21 = 44

26. 18% 342 24% 76% 76%  342 Mr Wong had 450 books at first. 1%  4.5 100%  450

27. Xueling + Siti (64) Jane (16) (24 – 16) units = 8 units 8 units = 14 shells 40 units = 5 x 14 shells 40 units = (50 + 20) shells Xueling collected 70 shells. Jane + Xueling Siti (24) (40)

28. This problem requires the ability to visualize.

29. x + b + d = 180 b x d

30. y e y + c + e = 180 c

32. y + c + e = 180

33. z + a + d = 180

34. v + b + e = 180

35. w + a + c = 180z w v d c 2a + 2 b + 2c + 2d + 2e + x + y + z + v + w = 5 x 180 x + y + z + v + w = 3 x 180 Hence, a + b + c + d + e = 180

36. Using The Model Method to Solve Word Problems DrYeap Ban Har Marshall Cavendish Institute Singapore Slides are available at www.banhar.blogspot.com

37. Mani has 245 ten-cent coins and 455 five-cent coins. Nina has 165 ten-cent coins and 135 five-cent coins. After Mani gives Nina some coins, of Mani’s coins are ten-cent ones and the ratio of the number of Nina’s five-cent coins to the number of her one-cent coins is 3 : 2. They have only five-cent and one-cent coins. Using The Model Method to Solve Word Problems Slides are available at www.banhar.blogspot.com Post Your Solutions on MCI’s Facebook Find the number of coins Mani gives to Nina.