# Hairu and the numbers part 18 (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 LPQ84

Hairu has two numbers in his mind. One of the numbers is 350. The sum of two numbers is 510. What is the different between the two numbers?

Solution:

Half of the sum of the number is 510 ÷ 2 = 255

The second number is smaller than the first number (350)

Draw the model

Per the model

The second number = 1 units = 510 – 350 = 160

Different between the two numbers = 350 – 160 = 190