Hairu shares his stickers part 41 (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 after reading the blog postings. This posting is an upper primary school math question on Problem Sum.

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

Upper primary school mathematics question UPQ349

At first Sarin had twice as many stickers as Hairu. After Sarin had given away 285 of his stickers, Hairu had twice as many stickers as Sarin. How many stickers did they have altogether at first?

Solution:

Sarin’s stickers is two times more than Hairu’s stickers at first

After Sarin given away 285 stickers,

Hairu’s stickers is two times more than Sarin’s stickers

Draw the math model

Per the model,

Total number of stickers equal to 6 units

The number of stickers given away is equal to 3 units of total stickers

3 units = 285

1 unit = 95

The number of stickers they had at first = 6 × 95 = 570