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Question
primary 6 | Maths
| Fractions
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Why is it 3×0.8?
Date Posted: 5 years ago
Views: 372
unit cost
p: 1u
n: 1u + 0.80
cost
3p: 3u
2n: 2u + 1.60
3u = 2u + 1.60
u = 1.60
cost of 1 notebook is $2.40
...
p: 1u
n: 1u + 0.80
cost
3p: 3u
2n: 2u + 1.60
3u = 2u + 1.60
u = 1.60
cost of 1 notebook is $2.40
...
See 1 Answer
It’s a bit difficult to explain why it’s “3 x $0.80” but here’s another method.
1 pen → 1 unit
3 pens → 3 units
1 notebook → 1 unit + $0.80
2 notebooks → 2 units + $1.60
3 pens = 2 notebooks
3 units = 2 units + $1.60
1 unit → $1.60
1 notebook: $1.60 + $0.80 = $2.40
1 pen → 1 unit
3 pens → 3 units
1 notebook → 1 unit + $0.80
2 notebooks → 2 units + $1.60
3 pens = 2 notebooks
3 units = 2 units + $1.60
1 unit → $1.60
1 notebook: $1.60 + $0.80 = $2.40
Thank you
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