Subjects/Foundational Numeracy/Multi-Step: Buy Two Things, Find Change
Foundational NumeracySubtraction

Multi-Step: Buy Two Things, Find Change

Solve problems that need both addition and subtraction.

14 min

🎯 What You'll Learn

You will learn to solve problems with two steps: first add up what you buy, then subtract from what you paid to find the change.

🏪 Market Story

Tunde has ₦100. He buys a meat pie for ₦35 and a drink for ₦40. How much change does he get?

Step 1: Add the prices: ₦35 + ₦40 = ₦75.

Step 2: Subtract from ₦100: ₦100 − ₦75 = ₦25.

Tunde gets ₦25 change!

📝 Let's Learn

Many real problems need more than one step. The key is: figure out what to do first, then what to do next.

Example 1: Funke buys a pen (₦15) and a notebook (₦45) and pays ₦100. Change? First: ₦15 + ₦45 = ₦60. Then: ₦100 − ₦60 = ₦40 change.

Example 2: Amina buys bread (₦50) and butter (₦80) and pays ₦200. Change? First: ₦50 + ₦80 = ₦130. Then: ₦200 − ₦130 = ₦70 change.

Example 3: Emeka buys rice (₦180) and beans (₦120) and pays ₦500. Change? First: ₦180 + ₦120 = ₦300. Then: ₦500 − ₦300 = ₦200 change.

✏️ Practice Questions

  1. Bola buys an exercise book (₦40) and crayons (₦35). She pays ₦100. How much change?
  2. Chidi buys shoes (₦250) and socks (₦50). He pays ₦500. How much change?
  3. Tunde buys garri (₦90), fish (₦75), and peppers (₦35). He pays ₦300. How much change?
Click to see answers
  1. ₦40 + ₦35 = ₦75. ₦100 − ₦75 = ₦25 change.
  2. ₦250 + ₦50 = ₦300. ₦500 − ₦300 = ₦200 change.
  3. ₦90 + ₦75 + ₦35 = ₦200. ₦300 − ₦200 = ₦100 change.

💡 Remember

For shopping problems: Step 1 — add all the prices. Step 2 — subtract the total from what you paid. This gives you the change!