Math in a few Minutes a day for Children ages 5-8 years - 30 Days of Timed Tests with Addition and Subtraction , competed your children on mathematics' skills with timeline improving day by day. Answer keys are included in the back of this book, so you can check your children's answers easily . A few minutes of math a day can help your children tremendously. This workbook has 30 days of reproducible addition and subtraction practice problems for digits 0-9. Use these pages as timed tests to improve your children's fluidity or let's do completition at your children's leisure .