Mr Tan's school bookshop receives 3 cartons of pencils. Each carton contains 144 pencils. He repacks all the pencils into smaller packs of 12 pencils per pack to sell to pupils. How many packs of pencils can Mr Tan make in total?
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Worked Solution
Step 1: Identify the two operations needed. We must first find the TOTAL number of pencils across all cartons (multiplication), then split that total into packs of 12 (division).
Step 2: Find the total number of pencils. 3 cartons × 144 pencils per carton = 432 pencils.
Step 3: Divide the total by the pack size to find the number of packs. 432 ÷ 12 = 36 packs.
Step 4: Check by reversing: 36 packs × 12 pencils per pack = 432 pencils total, and 432 ÷ 3 = 144 pencils per carton. ✓
Final answer: 36 packs.
Answer: 36
Correct answer: 36
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