During 1st grade, children will then learn addition and subtraction facts, two-digit numbers, some adding and subtracting with two-digit numbers, and some basics of measuring, time and money.
Ask family to quiz you on your multiplication tables. Once you have studied them enough to know them well, ask your family to quiz you on the tables you have just learned. This will help you remember them long term and keep the numbers fresh in your head. When you have all the tables memorized, ask them to quiz you on all of the numbers, not just one number at a time.