The 40 worksheets cover numbers 0 to 20 and addition and subtraction only. Each result is no larger than 20. The worksheets provide not only intensive drills but is also a strong math basic skills builder. The answer keys are provided at the end of the book.
Each worksheet can be used more than once until the student can work out each problem in a short amount of time without any mistakes.
Doing well with mental math will build up a student’s confidence in math.