My ds's math fact test was also the 100 problems in 5 minutes. Addition, subtraction, multiplication and division up to 12 and had to be mastered by the end of 4th grade. They started the addition and subtraction in 3rd but he was accelerated to 4th in 2nd grade. He struggled at the start and then embraced it. You got to attend an ice cream party if you got 100% on all test at the end of the year.