Definition:
To calculate means to work out the answer to a maths problem. You can calculate by using your brain, writing it down, or using a tool like a calculator.

Example:
If you have 5 apples and get 3 more, you can calculate that you now have 8 apples.

Calculator

Definition:
A calculator is an electronic device that helps you calculate numbers quickly. It can add, subtract, multiply, and divide, and some calculators can do even more advanced maths.

Example:
Pressing 7 + 4 on a calculator shows the answer 11.

Fun fact:
The calculator is like a modern version of the abacus!