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Question

Need some guide to solve this question.

is it using comparison or units x value?

 

Source: Nan Hua Primary

Answer

This is using unit x value method. Hope this helps you.

0 Replies 1 Like ✔Accepted Answer

Box A (50-cent coins) : Box B (20-cent coins)
1 unit : (1 unit + 53) [number of coins)

1 unit x 0.50 – (1 unit + 53) x 0.20 = 0.3 unit – 10.60 = 8.30
1 unit = (8.30 + 10.60)/0.30 = 31.50

Ans : $31.50.

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This is a Quantity Each Product question. 

   Quantity Each   Product
Box A 1u 0.5 0.5u
Box B 1u + 53 0.2 0.2u + 10.6

0.5u = 0.2u + 10.6 + 8.3

0.5u – 0.2u = 18.9

0.3u = 18.9 

1u = 18.9 ÷ 0.3 = 63

0.5u = 0.5 × 63 = $31.50

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Thanks

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