Koh Hui Yan (Xu Huiyan) 's answer to Gabriel Shoon's Primary 5 Maths question.

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Koh Hui Yan (Xu Huiyan)
Koh Hui Yan (xu Huiyan) 's answer
1 answers (Tutor Details)
1500 children. Sorry that I was not able to adjust the picture to the correct format.

I did not use calculator function at all.