Sarin’s family celebrating Hari Raya Puasa 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 presenting the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can acquire the skills to deal with Math Modeling, Math Problem Solving and Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is a lower primary school math question on Fraction and Problem Sum.

You can read the postings on Sarin’s family celebrating Hari Raya Puasa and Sarin’s family and Ramadan in Welcome page about story of Sarin’s family during Ramadan and Hari Raya Puasa.

Read also the posting on Sarin learns the Concept of Fraction (Mathematics Concept) on Fraction.

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

Lower primary school mathematics question LPQ102

48 friends and relatives visited Sarin’s family during Hari Raya Puasa. 1/8 of them were adults. There were 8 fewer boys than girls.

1. How many adults were there?
2. What fractions of the people are boys and what fractions are girls?

Solution:

Using model,

1/8 of the visitors were adults and 7/8 of the visitors were children,

8 units = 48

1 unit = 48 ÷ 8 = 6

The number of adults = 6

The number of children = 7 × 6 = 42

Among the children, 8 fewer boys than girls,

Per the model,

2 units = 42 – 8 = 34

1 unit = 17

The number of boys = 17

The number of girls = 17 + 8 = 25

The total number old visitors were 48,

The fraction of people were boys = 17/48

The fraction of people were girls = 25/48