Lower Primary Maths Problem Solving
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Lower Primary Maths Problem Solving

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This session is on problem-solving heuristics for parents of primary one and two children.

This session is on problem-solving heuristics for parents of primary one and two children.

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Lower Primary Maths Problem Solving Presentation Transcript

  • 1. Problem Solving Heuristics for Lower Primary Mathematics Yeap Ban Har Catholic High School (Primary)
  • 2. MATHEMATICAL PROBLEM SOLVING
  • 3.  
  • 4. The rationale of teaching mathematics is that it is “an excellent vehicle for the development and improvement of a person’s intellectual competence ”.
  • 5. National Institute of Education
  • 6. Wellington Primary School, Singapore Ministry of Education Singapore 2006 an excellent vehicle for the development and improvement of a person’s intellectual competence “ ” mathemati cs
  • 7. Move 3 sticks to get two squares.
  • 8. Move 3 sticks to get two squares.
  • 9. Wellington Primary School, Singapore
  • 10. Wellington Primary School, Singapore
  • 11. Wellington Primary School, Singapore
  • 12. Wellington Primary School, Singapore
  • 13. Wellington Primary School, Singapore
  • 14. Wellington Primary School, Singapore
  • 15. John had 1.5 m of copper wire. He cut some of the wire to bend into the shape shown in the figure below. In the figure, there are 6 equilateral triangles and the length of XY is 19 cm. How much of the copper wire was left?   19 cm x 5 = 95 cm 150 cm – 95 cm = 55 cm
  • 16. Example 1
  • 17. F A M I L Y F A M I L Y F A M I L Y . . .
  • 18. F A M I L Y F A M I L Y F A M I L Y . . . 6th 12th 18th What is the 50th letter?
  • 19. Example 2
  • 20. 104, 124, 144, 164, 184, . . .
  • 21. 10 4, 12 4, 14 4, 16 4, 18 4, 20 4, . . .
  • 22. 10 4, 12 4, 14 4, 16 4, 18 4, 20 4, 22 4, 24 4, 26 4, Position Number 1 10 2 12 3 14 4 16 5 18 … … 19 ?
  • 23. Example 3
  • 24. Even routine tasks such as finding the value of 7 x 9 are initially problems.
  • 25.        2 x 9 = 18 5 x 9 = 45
  • 26. Primary Mathematics Standards Edition
  • 27. Example 4
  • 28. 199 – 39 = 160 200 – 39 = ?
  • 29. Example 5
  • 30. 17 + 19                                    
  • 31. 17 + 19 16 + 20                                    
  • 32. Example 6
  • 33. - 3
  • 34. 100 - 97 3 101 - 98 3 102 - 99 3
  • 35. - 5
  • 36. 100 - 95 5 101 - 96 5 102 - 97 5 103 - 98 5 104 - 99 5
  • 37. Children may do guess-and-check to get the solutions. Some children may observe a pattern / relationship. Guess-and-check and observe a pattern are examples of heuristics.
  • 38. Example 7
  • 39.  
  • 40.
    • Khon Kaen, Thailand
  • 41. 4 1 5 2 3
  • 42. Princess Elizabeth Primary School
  • 43. Princess Elizabeth Primary School
  • 44. Example 8
  • 45. 2 4 5 Use a table is another problem-solving heuristic in mathematics. 2xx 4xx 5xx 245 254 425 452 524 542
  • 46. Example 9
  • 47.  
  • 48. 1 5 4 2
  • 49. Example 10
  • 50. A cupcake is sold at 40 cents each. How many cupcakes can be bought using $1 coin?
  • 51. Example 11
  • 52. A cupcake is sold at 40 cents each. How many cupcakes can be bought using $95?
  • 53. Example 12
  • 54. Ali has 3 picture cards. Janice has 2 more cards than Ali. How many picture cards do they altogether? Ali Janice
  • 55. Ali has 19 picture cards. Janice has 12 more cards than Ali. How many picture cards do they altogether? 19 Ali Janice 12
  • 56. Ali has 19 picture cards. Janice has 12 more cards than Ali. How many picture cards do they altogether? 19 Ali Janice 12
  • 57. Example 13
  • 58. Alan has 19 picture cards. He has 12 more cards than Bala. How many picture cards do they altogether? 19 Alan Bala 12
  • 59. Example 14
  • 60. Roy has some picture cards. Samantha has 12 more cards than Roy. They have 20 cards altogether. How many cards does Samantha have? Roy Samantha 12 20