TOPIC: SHOPPING – ADDITION AND SUBTRACTION OF MONEY
A: TEACHING AND LEARNING MATERIALS
- Toy money.
- Price tags.
- Pictures of market items.
- Classroom shop materials.
- Pupils’ writing books and pencils.
B: REFERENCE MATERIALS
- Scheme of work.
- Recommended Mathematics textbook for Primary 3.
- Online educational resources.
C: PREVIOUS KNOWLEDGE
The pupils can identify Nigerian currency and combine smaller denominations to make larger amounts.
D: PERFORMANCE OBJECTIVES
By the end of the lesson, pupils should be able to:
- Read simple price tags.
- Add amounts of money.
- Subtract amounts of money.
- Find the total cost of items.
- Calculate simple change after buying an item.
E: CONTENT
Reading Prices
Examples:
- Pencil – ₦100
- Book – ₦500
- Eraser – ₦50
Finding Total Cost
A book costs ₦500 and a pencil costs ₦100.
Total cost:
₦500 + ₦100 = ₦600
Subtraction of Money
If you have ₦1,000 and spend ₦400:
₦1,000 − ₦400 = ₦600
You have ₦600 left.
Finding Change
Ada buys a book for ₦700 and pays ₦1,000.
Change:
₦1,000 − ₦700 = ₦300
Ada receives ₦300 change.
Simple Shopping Problem
A ball costs ₦800 and a toy car costs ₦600.
Total cost:
₦800 + ₦600 = ₦1,400
F: LESSON PRESENTATION
F1: Teachers’ Activities
- Revises Nigerian currency.
- Displays price tags.
- Sets up a simple classroom shop.
- Demonstrates addition of money.
- Demonstrates subtraction and finding change.
- Gives pupils shopping word problems.
F2: Pupils’ Activities
- Read price tags.
- Buy and sell items using toy money.
- Add prices of items.
- Find amounts left after spending.
- Calculate simple change.
- Solve shopping problems.
G: CONCLUSION
The teacher revises addition and subtraction of money and corrects pupils where necessary.
Pupils are encouraged to practise simple shopping calculations.
H: EVALUATION GUIDE
Pupils should be able to answer the following questions:
- Find: ₦300 + ₦500.
- Find: ₦1,000 − ₦250.
- A book costs ₦400 and a pen costs ₦150. Find the total cost.
- You have ₦1,000 and spend ₦600. How much remains?
- A toy costs ₦700. If you pay ₦1,000, what is your change?
- Find: ₦850 + ₦150.
- What do we call the money returned after paying more than the cost of an item?