If the cost of oranges was 0.88 a pound and someone bought 4.5 pounds what is the amount that he paid?

Question

If the cost of oranges was 0.88 a pound, and someone bought 4.5 pounds what is the amount that he paid?

Answer 1

4.5 x .88 = $3.96 for 4 1/2 pounds when the cost is 88 cents per pound

4.5 x .88 = 4.5 x (1-.12) = 4.5 - .45 - .09 = 4.05 - 0.09 = 3.96 = $3.96

or just use a calculator, or do multiplication by hand 4.5 x .88 = 4.5 x .8 + 4.5 = .08 = 36 + 3.6 = 3.96