Hairu shares his stickers part 33 (Math Question)


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 will 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 Math Modeling, and Problem Sum.

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

Upper primary school mathematics question UPQ289

Sarin, Hairu and Fatimah each had some stickers. Sarin and Hairu had 38 stickers in total. Hairu and Fatimah had 41 stickers in total. If Sarin and Fatimah together had 47 stickers, how many stickers did Sarin have?


            Draw the Math model




            From the model

                        S + H – H – F + S + F = 38 – 41 + 47

                        S + S = 44

                        S = 22

                        The number of stickers Sarin had = 22

Alternative Solution:

            By equations


                        S + H = 38

                        H + F = 41

                        S + F = 47

            Solve the above three equations        

                        F – H = 47 – 38 = 9

                        2F = 41 + 9 = 50

                        F = 25

                        S = 47 – 25 = 22

                        The number of stickers Sarin had = 22  

More Questions on Problem Sum. Click here….


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