It is very important to check your answers using an inverse operation.

You can use a calculator.

Remember that....

Adding and subtracting are inverses.

Multiplying and dividing are inverses.

Example 1

594 - 26 = 568

Check by doing:

568 + 26 = 594

Example 2

41,820 ÷ 85 = 492

Check by doing

492 × 85 = 41,820

Let's have a go at some questions now.