🎯 Goal: Know how to compute unit price (price per unit) to see which is truly cheaper, not fooled by big packs.
Two packs of the same item but different size/count — total price can mislead. The unit price tells which is better.
Let’s explore
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Unit price = Price ÷ Quantity (or weight). E.g., 2 pens for 10,000d → unit price 5,000d/pen.
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Compare unit prices: the lower unit price is better (same quality).
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A big pack is not always cheaper — you must divide to know.
Practice activity
🔢 Pack A: 4 pens 24,000d. Pack B: 6 pens 30,000d. Compute unit price to see which is better.
Worked example: Pack A: 24,000 ÷ 4 = 6,000d/pen. Pack B: 30,000 ÷ 6 = 5,000d/pen. B has a lower unit price → B is the better deal even though the total is higher.
Quick quiz
1. Unit price is calculated by?
→ Price ÷ Quantity
2. 2 pens for 10,000d, unit price?
→ 5,000d/pen
3. Same quality, pick the pack with unit price?
→ Lower
4. Pack A 6,000d/pen, pack B 5,000d/pen, choose?
→ Pack B
5. A big pack with higher total — surely pricier per unit?
→ Not sure, compute unit price
6. Computing unit price helps you?
→ Not be fooled by big packs
🎯 Real-life mission
At the store, compare the unit price (per 100g) of two similar products.