Luckily for parents and teachers, there are plenty of websites that provide math problems for extra math practice. These problems are usually classified based on the age group they’re meant for, or the problem type. For example, for primary and middle school students there are 1st grade math problems, 2nd grade math problems, 3rd grade math problems, 4th grade math problems, 5th grade math problems, 6th grade math problems and 7th grade math problems . There are also math problems classified as addition problems , subtraction problems , multiplication problems and division problems .