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Question
primary 5 | Maths
| Fractions
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F: 28u
S: 8u
P: 21u
total = 57u
diff. = 13u
1u = 104/13 = 8
total 456
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method 2
3/4 - 2/7 = 21/28 - 8/28 = 13/28
total = 3/4 + 2/7 + 1
= 21/28 + 8/28 + 28/28
= 57/28
13/28 = 104
57/28 = 104/13 x 57 = 456
total 456
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