Eleen Tan's answer to Nithiyanandam Geetha's Primary 4 Maths question.
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Hope this helps.. the 2 fractions are referring to different totals.. so we do not change them to the same denominators when we draw the model..
Date Posted:
7 years ago
Model ok how to calculate the unit
From the model, total no. Of people = 7u, out of that, men = 3u since the questions said that the men is 3/7 of the total no. Of people
7u - 3u = 4u.. this is the remaining people consisting of women and children. Since 3/4 of the remainder are women... 3u out of that 4u will be women.. and the last 1u will be for children
Question said that the difference between the women and children is 600.. (women) 3u - (children) 1u = 2u
2u = 600
1u = 600 ÷ 2= 300
Total no. Of people 7u= 300x7=2100(ans)
7u - 3u = 4u.. this is the remaining people consisting of women and children. Since 3/4 of the remainder are women... 3u out of that 4u will be women.. and the last 1u will be for children
Question said that the difference between the women and children is 600.. (women) 3u - (children) 1u = 2u
2u = 600
1u = 600 ÷ 2= 300
Total no. Of people 7u= 300x7=2100(ans)
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