Sarin’s family attend concert at the Esplanade Part 24 (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 presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn how to deal with Math Modeling, Math Problem Solving and Problem Sum from Lower Primary School to Upper Primary School level. This posting is an upper primary school math question on Fraction and Problem Sum.

The story on Sarin’s family attend concert at the Esplanade you can read postings on Sarin’s family attend concert at the Esplanade in Welcome category and Sarin’s family attend concert at the Esplanade Part 2 (Math Question).

You should click and read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand Portion or Fraction.

Upper primary school mathematics question UPQ435

There are some pupils attending a story telling session in the Esplanade library. 3/8 of the pupils are boys. 11/15 of the girIs bring along a story book. If there are 282 more girls than boys,

a) what fraction of all the pupils are girls who bring along a story book?

b) how many girls do not bring along a story book?

 Solution:

            Draw the fraction model

UPQ435-1

 

            From the model

            The fraction of all the pupils are girls wearing spectacles = 5/8 × 11/15 = 11/24

            The number of Girls more than Boys in term of units = 15 – 9 = 6 units

            6 units = 282

            1 unit = 47

            The number of girls do not bring along a story book = 4 × 47 = 188

Alternative Solution:

UPQ435-3

            The fraction of all the pupils are girls bring along a story book = 5/8 × 11/15 = 11/24

 

UPQ435-2

            2 units = 282

            1 unit = 141 pupils

            Total number of girls = 5 × 141 = 705

            The number of girls do not bring along a book = 705 × 4/15 = 188

 

More Questions on Problem Sum. Click here…

More Questions on Fraction. Click here….

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