A family in Singapore part 29 (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 can acquire the skills to deal 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 a lower primary school math question on Problem Sum.

You can click here and read the posting on A family in Singapore to know about Sarin’s family.

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

Lower primary school mathematics question LPQ71

6 years ago, the age of Hairu’s father was 5 times the age of Hairu. Their total age now is 60. How old will Hairu’s father be in 2 years’ time?

Solution:

6 years ago, the age of Hairu’s father was five times the age of Hairu

This year, both of them are 6 years older

The math model for based on this year age is

From the model

6 units = 60 – 12 = 48

1 unit = 48 ÷ 6 = 8 years

The age of father this year = 8 × 5 + 6 = 46 years old

In two years time, the age of father = 46 + 2 = 48 years old