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Tiong Beng Sim

Asked 9 years ago

SG Primary 6 Number and Algebra

This question is extremely challenging. Pls help. Thank you.

Replies 4

Alice Lieu

5 years ago

Choy Ban Heng

This question is challenging if you stick to the use of the Model Method because you need to resort to a "simultaneous equation" method in order to solve it. But the question is very manageable if one realises that the amount that Sarah had in a multiple of $198 (First Common Multiple of 22 and 18). Then, the solution can be easily obtained by doing some simple arithmetic in a systematic way as shown:

5 years ago

Tiong Beng Sim

Thank you very much! :)

5 years ago

Choy Ban Heng

Tiong Beng Sim, you are most welcomed. It is good to remember that the math syllabus includes many other problem solving strategies as well. The child benefits most if he/she has a wide repertoire of heuristics at his/her disposal.

5 years ago