In this activity, we will learn to solve problems using a calculator.

Let's say we wanted to find the missing value in the following calculation:

79.5 × __________= 773.9

We need to do the inverse of multiplication, which is division.

We need to do 773.9 ÷ 79.5

Clearly, a calculator is called for here!

First of all, clear the calculator display of any previous calculations.

Now enter: 773.9 ÷ 79.5 =

It should come up with the answer 9.734591195 on the screen.

We usually round numbers to one decimal place unless asked to do something different, but sometimes we round to** three decimal places,** to be more** **accurate.

In this case, we would put 9.735 as the answer.

Now we can fill in the missing number: 79.5 × ** 9.735** = 773.9

We might have to do percentages on the calculator. Don't worry if your calculator doesn't have a % sign - many don't!

Let's say we were asked to find 59% of 180

A percentage simply means that number divided by 100, so we can change 59% into 0.59 by dividing by 100.

Then we simply do 0.59 x 180 =

We find that **106.2** is our answer.

Let's have a go at some questions now.