PSLE Mathematics

Dr Yeap Ban HarMarshall Cavendish Institute

Singapore

www.banhar.com

Photo Credit: Students solving a mathematics problem using draw-a-diagram heuristic at Da Qiao Primary School.

3 units = $12

1 unit = $4

8 units = 8 x $4 = $32

Kyla had $32 at first.

Alternate Method$12 ÷ 3 x 8 = $32

Model Method

boys

girls

34

boys

girls

68

boys

girls

88 – 68 = 20

boys

girls

88 – 68 = 20

boys

girls

boys

girls

boys

girls

34

34 – 20

2 girls units = 14

1 girls unit = 7

3 girls units = 21

21 girls wore goggles that day.

PSLE 2006 – 2010 Page 13 Question 45

Photo: Woodlands Primary School

PSLE 2006 – 2010 Page 13 Question 46

1.2 m x 42 = 50.4 m

43 – 6 = 37 There were 36 spacing

50.4 m ÷ 36 = 1.4 m The new spacing was 1.4 m.

PSLE 2006 – 2010 Page 19 Question 58

Guess when each tried taking 11

33 Last girl had 11 sweets 41 Last girl had 8 sweets 49 Last girl had 5 sweets 57 Last girl had 2 sweets

PSLE 2006 – 2010 Page 19 Question 58

List 1 List 2

11 + 622 + 633 + 644 + 655 + 666 + 6

16 + 2524 + 2532 + 2540 + 2548 + 2556 + 2

PSLE 2006 – 2010 Page 19 Question 58

List 1 List 2

11 + 622 + 633 + 644 + 655 + 666 + 677 + 688 + 699 + 6

16 + 2524 + 2532 + 2540 + 2548 + 2556 + 2564 + 2572 + 2580 + 25

PSLE 2006 – 2010 Page 19 Question 58

3 x ? = 2 + 25

? = 9

There were 10 girls.

There were 9 x 11 + 6 = 8 x 10 + 25 = 105 sweets altogether.