Lesson

Do you remember the value of coins ?

What is the value of each coin?

a

Worked Solution

b

Worked Solution

Idea summary

The value of a coin is written on the coin.

Silver coins are for cents, and gold coins are for dollars.

All notes have dollar values. The value is written on the note.

When we go to the shops, we make purchases of items such as groceries, toys, or clothes. Watch this video to see how we work out the total cost of purchases.

John wants to buy a toy car for \$22.50. Which of the following collections of money could he use so that he will not get any change?

A

B

Worked Solution

Idea summary

To add money we can write the values as decimals and add them using a vertical algorithm.

If we pay for an item with the exact amount of money that the item costs, then we will not get any change back.

If you buy something at a shop, you may need the shopkeeper to give you change. We can count up to work out how much change we should get.

Which of the following shows the change you would get, if you paid with \$40 and spent \$23.50?

A

B

Worked Solution

Idea summary

- We can add up the cost of each item we are purchasing to find the total.
- We can calculate the change by finding the difference between the amount we spent and the amount we paid with.

uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers