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Proudly Presents Heuristics Approach Model Approach Solving Challenging Primary Mathematical Problems

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Adrian Ng Principal Trainer. Proudly Presents Heuristics Approach Model Approach Solving Challenging Primary Mathematical Problems. Can we solve this 2009 PSLE question within 5 min?.

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Presentation Transcript
slide1

Adrian Ng

Principal Trainer

Proudly Presents

Heuristics Approach

Model Approach

Solving Challenging Primary Mathematical Problems

slide2

Can we solve this 2009 PSLE question within 5 min?

Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim’s sweets to chocolates became 1:7 and the ratio of Ken’s sweets to chocolates became 1:4. How many sweets did Ken buy?

Principal trainer of Ace Maths will demonstrate how it can be done.

slide3

1p+12 = 1u

x4

Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim’s sweets to chocolates became 1:7 and the ratio of Ken’s sweets to chocolates became 1:4. How many sweets did Ken buy?

Ken

Jim

4p+48 = 4u

4u+18 = 7p

7p

4u

18

4u = 7p-18

12

18

4p+48 = 7p-18

7p

1u

4u

7p

1p

18

4p

48

1p + 12 = 22+12 = 34

34x2 = 68

3p = 66

Ans.: 68 sweets

1p = 22

slide4

Note: This question was provided by students who have sat for the 2009 examination. It may vary from the actual examination question.

slide5

Thank You

www.aceMaths.com