Hor Kuok Theng's answer to Luana's Primary 5 Maths Percentage Singapore question.

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Hor Kuok Theng
Hor Kuok Theng's answer
20 answers (A Helpful Person)
Is this really a P5 problem?

Solved with some algebraic manipulation, which is, to the best of my knowledge, outside of the P5 syllabus.

Alternatively, guess and check may work, but will be very time consuming, as each possible answer has to be verified and eliminated accordingly.

To use guess and check, you will have to list out a combination of multiples of 7 and multiples of 10 that can add up to 132.
J
J
4 years ago
It is usually called the unit-part method in PSLE syllabus. Drawing models to deduce the value of 1 part/unit is also employed