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Whole Numbers (Pri-5)

/ Whole Numbers Clementi Primary School / Homework (2018)
A bag contained some 20 cent and 50 cent coins There were 14 fewer 50 cent coins than 20-cent coins The total amount of money in the bag was $27.30 How many 50 cents coins is there in the bag?
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September 5, 2018
 
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Refering model to below:( n + 14 ) × 0.20 + ( n × 0.50 ) = 27.300.2n + 2.8 + 0.5n = 27.300.7n = 27.30 - 2.8n = 24.5 ÷ 0.7 = 35  (ans)
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Comments 1
Sep 5, 2018 01:47 AM
Henry, thanks so much for the solution
September 5, 2018
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