At five cents per box, how much would 40 boxes earn?

At five cents per box, how much would 40 boxes earn?

• A. $2.00
• B. $0.40
• C. $4.00
• D. $8.00

Answer: (A)

The main idea here is multiplying a unit price by a quantity to find a total. Each box brings in five cents, i.e., $0.05. For 40 boxes, multiply 40 by 0.05: 40 × 0.05 = 2.00, so the total is $2.00. You can also think in cents: 5 cents per box for 40 boxes is 5 × 40 = 200 cents, which equals $2.00. The other amounts come from misplacing the decimal or mixing up cents and dollars, but with the correct unit price, the total is $2.00.

The main idea here is multiplying a unit price by a quantity to find a total. Each box brings in five cents, i.e., $0.05. For 40 boxes, multiply 40 by 0.05: 40 × 0.05 = 2.00, so the total is $2.00. You can also think in cents: 5 cents per box for 40 boxes is 5 × 40 = 200 cents, which equals $2.00. The other amounts come from misplacing the decimal or mixing up cents and dollars, but with the correct unit price, the total is $2.00.