Sarin and his coin bank part 48 (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 presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with the Math Modeling, the Math problem solving and the 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 Fraction and Problem Solving.

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

Read also the posting on Sarin learns the concept of Fraction (mathematics concept) to understand Fraction.

Challenge yourself with the Question before look out for the given solution‼!

Upper primary school mathematics question UPQ493

Sarin has 36 coins in the coin bank. 5/12 of them are twenty-cent coin and the rest are fifty-cent coins. How much money does Sarin have in the coin bank?

Solution:

Draw the model,

Per the model

12 units = 36

1 unit = 3

The number of 20₵ coins = 5 × 3 = 15

The number of 50₵ coins = 7 × 3 = 21

The money that Sarin has in the coin bank = 15 × 0.2 + 21 × 0.5 = \$13.50