Money Problems: Saving and Spending

🎯 What You'll Learn

You will solve problems about saving and spending money, combining addition, subtraction, and multiplication.

🏪 Market Story

Funke wants to buy a school bag that costs ₦600. She saves ₦50 every week. How many weeks will it take her to save enough?

📝 Let's Learn

Funke saves ₦50 per week. She needs ₦600.

Method: ₦600 ÷ ₦50 = 12 weeks. She needs to save for 12 weeks.

Check: 12 × ₦50 = ₦600. ✓

Example 1: Tunde saves ₦30 per week. After 8 weeks, how much has he saved? 8 × ₦30 = ₦240. He then buys a book for ₦85. Left: ₦240 − ₦85 = ₦155.

Example 2: Amina has ₦100 saved. She earns ₦25 each day for 4 days. Total: ₦100 + (4 × ₦25) = ₦100 + ₦100 = ₦200.

Example 3: Chidi needs ₦500. He already has ₦180 and earns ₦40 per week. How many more weeks? He needs ₦500 − ₦180 = ₦320 more. ₦320 ÷ ₦40 = 8 more weeks.

✏️ Practice Questions

1. Bola saves ₦20 per week. How much does she have after 10 weeks?
2. Emeka needs ₦300 for a football. He has ₦120 saved and earns ₦60 per week. How many weeks until he can buy it?
3. Funke saves ₦45 per week for 6 weeks, then spends ₦150. How much does she have left?

Click to see answers

1. 10 × ₦20 = ₦200.
2. Needs: ₦300 − ₦120 = ₦180 more. ₦180 ÷ ₦60 = 3 more weeks.
3. Saved: 6 × ₦45 = ₦270. After spending: ₦270 − ₦150 = ₦120 left.

💡 Remember

Saving is addition over time (multiply your weekly savings by weeks). To find how long to save, divide the goal by your weekly amount. Always subtract spending to see what's left!