Hairu shares his stickers part 27 (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 will learn the skills of dealing with Math Question Solving, Math Modeling and Problem Sums from Lower Primary School to Upper Primary School level. This posting is an upper primary school math question on Fraction, Ratio and Problem Sum.

You can click and read postings Sarin learns concept of ratio in school and Sarin learns the concept of Fraction (mathematics concept) to understand Ratio and Fraction or Portion.

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

Upper primary school mathematics question UPQ251

Hairu had total of 330 Batman stickers and Transformer stickers. After he gave his brother Sarin 0.4 of his Batman stickers and 0.75 of his Transformer stickers, he had half as many Batman stickers as Transformer stickers. How many Transformer stickers had he left?

Solution:

0.4 of his Batman stickers gave to Sarin

In fraction, Hairu left 6/10 = 3/5 and Sarin have 4/10 = 2/5 for Batman stickers

0.75 of his Transformer sticker gave to Sarin

In fraction, Hairu left 25/100 = 1/4 and Sarin have 75/100 = 3/4 for Transformer stickers

Sarin left with half as many Batman stickers as Transformer stickers

Make the model

Per the model,

22 units = 330

1 unit = 15

The number of Transformer stickers he had left = 3 × 15 = 45