Sarin’s family in Kluang part 20 (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 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, Ratio and Problem solving.

Read the posting on Sarin’s family in Kluang about Sarin’s family venture in Kluang.

You can read the posting on Sarin learns concept of ratio in school to understand the concept of Ratio.

You can also read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand Portion or Fraction.

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

Upper primary school mathematics question UPQ511

Sarin’s family visited the Popular Book Co. in Kluang Mall during their visit to Kulang. In Popular Book Co., Fatimah bought an equal number of erasers and markers. She spent ½ of his money on markers and 1/5 of the remaining money on erasers. She could buy 24 erasers with the money left.

(a) How many markers did she buy?

(b) If each eraser is $1 cheaper than each marker, how much did she spend on markers?

Solution:

Draw the model based on the spending

UPQ511-1

Per the model

The money left can buy 24 rules

The number of erasers bought = 24 ÷ 4 = 6

Since equal number of markers and erasers bought

The number of markers bought = 6

The amount spent on each marker to each eraser = 5 : 1

UPQ511-2

The price difference of the erasers and markers is 4 units

4 units = 1

1 unit = 1/4

The cost of 1 marker = 5 × 1/4 = 5/4

The total cost of the makers = 6 × 5/4 = 30/4 = $7.50

 More Questions on Ratio. Click here…..

More Questions on Problem Solving. Click here…..

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