The blog postings are about the Singapore Math. The readers can learn from the postings on 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 will learn the skills of dealing with the Math Problem Solving, the Math Modeling 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 Sum.
You can read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand the concept of Fraction or Portion.
Challenge yourself with the question before look out for the given solution‼!
Upper primary school mathematics question UPQ462
Hairu, Sarin and Fatimah have 144 stickers altogether. At first, Hairu gave 12 stickers to Sarin. Then, Sarin gave 8 stickers to Fatimah. After that, Fatimah gave 20 stickers to Hairu. The total number of stickers that Sarin and Fatimah have now is half that of what Hairu has. The number of stickers that Sarin has now is 3/5 of the number of stickers that Fatimah has. How many stickers did Hairu and Fatimah have altogether at first?
Start the math model with the number of stickers that Sarin has is 3/5 of the stickers that Fatimah has then includes the information that the total number of stickers that Sarin and Fatimah have is half that of what Hairu has.
Since Sarin’s stickers is 3/5 fraction of Fatimah’s stickers
The Total number of units for Sarin and Fatimah stickers = 8 units
The number of stickers that Hairu has = 16 units
The stickers are trahsfer between them, the total number of stickers no changed = 144
The math model,
24 units = 144
1 unit = 6 stickers
Hairu given away 12 stickers but got back 20 stickers
The number of sticker that Hairu has at first = 16 × 6 + 12 – 20 = 88
Fatimah given away 20 stickers and got back 8 stickers
The number of stickers that Fatimah has at first = 5 × 6 + 20 – 8 = 42
The number of stickers that Hairu and Fatimah have at first = 88 + 42 = 130