The Praxis Core for Educators: Mathematics test and the Praxis Core for Educators: Combined test both have a four-function calculator built into the testing software.

Here are some helpful tips for using the four-function online calculator:

• Most of the questions requiring the use of the four-function online calculator don't require difficult computations, so don't use the calculator just because it's available.
• Use it for calculations that you know are tedious.
• Avoid using it for simple computations that are quicker to do mentally.
• Avoid using it to introduce decimals if you are asked to give an answer as a fraction.
• Some questions can be answered more quickly by reasoning and estimating than by using the calculator.
• If you use the calculator, estimate the answer beforehand so you can determine whether the calculator's answer is "in the ballpark." This may help you avoid key-entry errors.