Ahmad has $50.00. At the NTUC bookshop, he buys 3 books that cost $4.85 each and a pencil case that costs $7.30. How much change does Ahmad receive?
Show Worked Solution
Worked Solution
Step 1: Find the total cost of the 3 books. Multiply: 3 × $4.85.
4.85 × 3: 3 × 5 = 15 (write 5, carry 1); 3 × 8 = 24 + 1 = 25 (write 5, carry 2); 3 × 4 = 12 + 2 = 14. So 3 × $4.85 = $14.55.
Step 2: Add the cost of the pencil case to find total amount spent.
$14.55 + $7.30 = $21.85.
Step 3: Subtract the total spent from $50.00 to find change.
$50.00 − $21.85: borrow across the decimal — 100 cents − 85 cents = 15 cents; then 49 dollars − 21 dollars = $28.
Change = $28.15.
Final answer: $28.15.
Answer: $28.15
Correct answer: $28.15
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