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TOPIC: P5 ratio unit 3.7

P5 ratio unit 3.7 1 year 5 months ago #1

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A box contained a number of 20-cent and 50-cent coins in the ratio 3:4. When ten 50-cent coins were taken out and replaced by 20-cent coins, the ration became 7:5. Find the sum of money in the box at first.
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P5 ratio unit 3.7 1 year 5 months ago #2

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P5 ratio unit 3.7 1 year 5 months ago #3

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How to explain to a p5 students the equal (=) for the following?

28u - 70 = 15u + 125
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P5 ratio unit 3.7 1 year 5 months ago #4

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