3.3.2 Checking Your Math
You will often perform multiplication and division on your calculator. However, you should be able to check your answers by hand just in case you don’t have access to a calculator, or in case you incorrectly key in a number on your calculator. Remember that a calculator is only as good as its user is at inputting information!
In order to check that your calculations are reasonable, it is useful to be familiar with multiplication and division by the digits 2 through 10 and 100. Knowing the results of multiplying by the numbers from 2 to 10 can help you to work out calculations fairly quickly and confidently.to see how you get on and to brush up on your multiplication tables.
Having the multiplication tables at your fingertips really helps and the only way for most of us to do this is with practice. You can use spare moments in your day to do this as well as asking friends or family to join you in your task!
Before we will look at some methods that might be useful when multiplying or dividing, let’s make sure that we understand the math language associated with these.