Seminar for Parents at PLMGS on PSLE

PSLE Mathematics
DrYeap Ban Har
Marshall Cavendish Institute
Singapore
www.banhar.com
Photo Credit: Students solving a mathematics problem using draw-a-diagram heuristic at Da Qiao Primary School.

Model Method
3 units = $12
1 unit = $4
8 units = 8 x $4 = $32
Kyla had $32 at first.
Alternate Method
$12 ÷ 3 x 8 = $32

boys
34
girls

boys
68
girls

boys
88 – 68 = 20
girls

boys
girls

boys
2 girls units = 14
34
1 girls unit = 7
girls
3 girls units = 21
21 girls wore goggles that day.
34 – 20

PSLE 2006 – 2010 Page 13 Question 45

Photo: Woodlands Primary School

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.

Guess when each tried taking 11
33 Last girl had 11 sweets

List 1 List 2
11 + 6
22 + 6
33 + 6
44 + 6
55 + 6
66 + 6
16 + 25
24 + 25
32 + 25
40 + 25
48 + 25
56 + 2

List 1 List 2
11 + 6
22 + 6
33 + 6
44 + 6
55 + 6
66 + 6
77 + 6
88 + 6
99 + 6
16 + 25
24 + 25
32 + 25
40 + 25
48 + 25
56 + 25
64 + 25
72 + 25
80 + 25

3 x ? = 2 + 25
? = 9
There were 10 girls.
There were 9 x 11 + 6 = 8 x 10 + 25 = 105 sweets altogether.

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Seminar for Parents at PLMGS on PSLE

by Jimmy Keng on Mar 06, 2011

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