Multiplying money
When we buy many of the same item, we multiply the price by how many we buy. Multiplying is a fast way of adding the same amount again and again, so it saves time.
Key idea
Total = price × number of items.
A worked example
Worked example
One eraser costs RM2. How much do 3 erasers cost?
Multiply the price by the number: RM2 × 3 = RM6. This is the same as adding RM2 + RM2 + RM2 = RM6.
Small numbers
RM5 × 2 = RM10. For coins, 20 sen × 4 = 80 sen. Use the times tables you already know, and you will find the total quickly. If you forget a fact, you can always add the price again and again to reach the same total.
Remember
- Multiply price × quantity.
- Check with repeated addition.
- Keep the numbers small and neat.