# Hairu and the numbers part 24 (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 Number and Problem Sum.

To read  the mathematics concept for Numbers read the posting on Hairu and the numbers.

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

Lower primary school mathematics question LPQ93

Hairu has two numbers in mind. The sum of two numbers is 40. The difference between the two numbers is 22. Find the smaller number.

Solution:

Draw the model

From the model

The smaller number in term of unit = 1 unit

2 units = 40 – 22 = 18

1 unit = 9

The smaller number is 9