Proudly Presents Heuristics Approach Model Approach

# Proudly Presents Heuristics Approach Model Approach

## Proudly Presents Heuristics Approach Model Approach

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1. Adrian Ng Principal Trainer Proudly Presents Heuristics Approach Model Approach Solving Challenging Primary Mathematical Problems

2. Past School Exam solution (P6)

3. Anglo Chinese School (Primary) / P6 Mathematics 2008 / Combined Preliminary Examination / Paper 2

4. At first a fruit stall, the number of oranges is the same as the number of apples at firs. 6 oranges and 14 apples were sold. As a result, the ratio of the number of oranges to the number of apples became 7 : 5. a) How many apples were left? b) How many fruits were there at first? Orange Apple 7u+6 = 5u+14 -14 -6 2u = 8 6 14 1u = 4 7u 5u (a) 5u = 5x4 = 20 (b) 5u+14 = 5x4 +14 = 34 34x2 = 68 • Ans: • 20 apples • 68 fruits

5. Singapore Chinese Girls’ School (Primary) / Preliminary Examination 2008 / Q48

6. (20u) cow Remainder At a farm, 40% of the animal are cows, 90% of the remainder are sheep and the rest are ducks. There are 56 more sheep than cows. After some cows died, 20% of the remaining animals at the farm are cows. How many cows are there left at the farm? cow Sheep Duck -? Sheep (3x9=27u) 1u 4u Duck 4u  214+24 = 240 (3u) 1u  240÷4 = 60 27u-20u=7u Ans.: 60 cows 7u  56 1u  8 Cow: 20u  20x8=160 Sheep: 27u  27x8=216 Duck: 3u  3x8=24

7. Thank You