Hairu and the numbers part 21 (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 presenting the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with Math Question Solving, Math Modeling and Problem Sums from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Number and Problem Sum.

To read the posting on Hairu and the numbers to understand the concept of number.

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

Upper primary school mathematics question UPQ366

Hairu has 3 cards. Each card is printed with a different whole number. The largest number is 29. When added 2 numbers on the cards each time, the sums are 38, 40 and 56 respectively. What is the smallest number?

Solution:

UPQ366-1

 

 

            The combine numbers are 38, 40 and 56

UPQ366-2

 

 

            The largest number is 29 so 29 plus the second number gives the largest combine number

            The second number = 56 – 29 = 27

            The sum of the smaller and the second number give the smaller combine number.

            The smallest number = 38 – 27 = 11      

More Questions on Number. Click here….

More Questions on Problem Sum. Click here….

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