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Question
primary 6 | Maths
| Fractions
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total: 380 + 22u
E: 380+11u
F: 11u
total no change
after
total: 380 + 22u
E: 180 + 11u + 20 = 200 + 11u
F: (380 + 22u - 20)/2 = 180 + 11u
diff. = 180 = 4parts
1 part = 45
11 parts = 495
380 + 11u = 495
11u = 115
at first , F has 115
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like lego blocks