# A family in Singapore part 38 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about 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 will able to acquire knowledge of dealing with Math Modeling, Math Problem Solving and Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Average Number and Problem Sum.

You should read the posting on Sarin learns Average Number, Percentage and Charting in school (Math Concept) to understand the concept of Average Number.

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

Upper primary school mathematics question UPQ340

The average mass of Sarin, Hairu and Fatimah was 48 kg. Sarin weighed 58 kg. Hairu was 8 kg lighter than Sarin. What was Fatimah’s mass?

Solution:

Draw the math model based on the mass of Sarin, Hairu and Fatimah

From the model

The mass of Fatimah = 144 – 58 – 58 + 8 = 36 kg