If your mental math skills could use some improvement (like mine could), I’ve created an online tool to practice math problems. There are the basic problems of addition, subtraction, multiplication and division, as well as calculating the tip and determine someone’s age. If you have other calculations that are commonly encountered in daily life, leave a comment so I can add it.
To begin practicing, select the problem type, type your answer in the text field then hit enter. It will check your answer and move on to the next problem, then display your results when you’ve completed all the problems.