# Sarin and his coin bank part 30 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. The blog presenting the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skill of dealing with Math Question Solving, Math Modeling and Problem Sums from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is a lower primary school math question on Problem Sum.

You can read posting Sarin and his coin bank on the story of coin bank.

Challenge yourself with the question before look out for the given solution‼

Lower primary school mathematics question LPQ73

Sarin, Hairu and Fatimah saved 390 dollars. Sarin saved twice as much money as Hairu. Hairu saved three times as much money as Fatimah. How much money did Sarin save?

Solution:

Draw the math model used Fatimah as base

Three times of Fatimah’s saving is equal to Hairu’s saving

Two times of Hairu’s saving is equal to Sarin’s saving

The Math Model

Per the model

Total saved = 10 units = 390

1 unit = 390 ÷ 10 = 39

The amount of saving Sarin had = \$39 × 6 = \$234