Question: John buys 4.85 pounds of oranges. If the oranges cost $0.68 per pound, estimate the amount that he needs to pay.
A ) $50
B ) $5
C ) $4
D ) $6
Steps to derive
1 Cost of oranges per pound = $0.68
2 $0.68 can be rounded to $1.
3 Quantity of oranges bought = 4.85 pounds
4 4.85 pounds can be rounded to 5 pounds.
5 Estimated amount to be paid = $1 × 5 = $5
[On multiplying.]
6 So, the amount that John needs to pay is about $5.
Hence the right answer is Option B
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