psle maths revision notes · 2020. 11. 3. · psle maths revision notes. 2015 psle mathematics...

PSLE MathsRevision Notes

2015 PSLE Mathematics Revision/Summary Notes

(RGPS)

Topics1) Whole Number2) Algebra3) Fraction4) Percentage5) Ratio6) Speed7) Circles8) Supposition or Assumption Method9) Excess and Shortage10) Geometry11) Tessellation12) Nets of Cube

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RAFFLES GIRLS' PRIMARY SCHOOL

MATHEMATICS

Name: ---Class:

Topic: Whole Numbers

Example:

PRIMARY 6

Date: ______ _

Key Concept: Constant difference

Mrs Robert is 36 years old and her daughter is 24 years younger. How many years ago was Mrs Robert five times as old as her daughter?

Method 1:

Mrs Robert

Daughter ,...__ __ -JI i., ____A_g_e_d-iff_e

_r-en

_c_e ______.,

Difference in age -+ 36 - 12 = 24 (age difference remains unchanged)

4 units-+ 24 1 unit -+ 6

Mrs Robert's age when her daughter was 6 years old-+ 6 x 5 = 30 Number of years ago --. 36 - 30 = 6 years ago

Method 2:

Mrs Robert Daughter Difference 36 12 24

Now 3 1 2

Before 5 1 4 5x6 1 X 6 4x6 30 6 24

Number of years ago -+ 36 - 30 = 6 years ago

Ans:§

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