Lesson

We need to remember how to calculate the total amount of money that we have. Let's try this problem.

Which of the following shows a total of \$22.50?

A

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.

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

Let's learn more about calculating change.

How much change would you receive from \$10 if you spent \$7.50?

Worked Solution

Idea summary

We can either count up or count back to find the difference between the amount of money we start with and the amount of money that we spent.