Two-Step Problems: Buy and Get Change
Solve problems that require multiplying then subtracting.
🎯 What You'll Learn
You will solve two-step problems where you first calculate a total cost (multiplication), then find the change (subtraction).
🏪 Market Story
Chidi has ₦200. He buys 3 exercise books at ₦45 each. How much change does he get? This needs two steps: Step 1: Find the total cost. Step 2: Find the change.
📝 Let's Learn
Step 1: Total cost = 3 × ₦45 = ₦135.
Step 2: Change = ₦200 − ₦135 = ₦65.
Example 1: Amina buys 4 bananas at ₦15 each and pays ₦100. Step 1: 4 × ₦15 = ₦60. Step 2: ₦100 − ₦60 = ₦40 change.
Example 2: Tunde buys 6 pencils at ₦10 each and pays ₦100. Step 1: 6 × ₦10 = ₦60. Step 2: ₦100 − ₦60 = ₦40 change.
Example 3: Funke buys 5 biscuit packs at ₦25 each and pays ₦200. Step 1: 5 × ₦25 = ₦125. Step 2: ₦200 − ₦125 = ₦75 change.
✏️ Practice Questions
- Bola buys 3 pens at ₦20 each. She pays with ₦100. How much change?
- Emeka buys 4 mangoes at ₦12 each. He pays with ₦100. How much change?
- Amina buys 7 sweets at ₦5 each and pays with a ₦50 note. How much change does she receive?
Click to see answers
- 3 × ₦20 = ₦60. Change: ₦100 − ₦60 = ₦40.
- 4 × ₦12 = ₦48. Change: ₦100 − ₦48 = ₦52.
- 7 × ₦5 = ₦35. Change: ₦50 − ₦35 = ₦15.
💡 Remember
Two-step problems are common in real life. First multiply to find the total cost, then subtract from what you paid to find the change. Take it one step at a time!