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primary 5 chevron_right Maths chevron_right Fractions chevron_right Singapore

How to solve in model not branching.

Date Posted: 5 years ago
Views: 397
J
J
5 years ago
248 - 96 = 152

So 5/8 boys and 4/7 girls left = 152

Remaining = 3/8 boys and 3/7 girls = 96

1/8 boys and 1/7 girls = 96 ÷ 3 = 32


So 7/8 boys and 7/7 girls = 32 x 7 = 224
Compare this with the total boys and girls.
8/8 boys and 7/7 girls = 248

So difference = 248 - 224 = 24
Difference also = 1/8 boys

1/8 boys = 24
boys = 24 x 8 = 192

Girls = 248 - 192 = 56



Or

1/8 boys and 1/7 girls = 96 ÷ 3 = 32
So 8/8 boys and 8/7 girls = 32 x 8 = 256
Compare this with the total boys and girls.
8/8 boys and 7/7 girls = 248

So difference = 256 - 248 = 8
Difference also = 1/7 girls

1/7 girls = 8
Girls = 7 x 8 = 56

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LIU SHAOMIN
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