Download or read book Addition and Subtraction Drills - Math Book 1st Grade | Children's Math Books written by Baby Professor and published by . This book was released on 2017-12 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Why does your first grader need more addition and subtraction drills? Because it is through drills that addition and subtraction skills can improve. Enough with the theories because math requires hands-on work. Your child needs to be exposed to as many equations as possible, and these should gradually progress in terms of the level of difficulty. Work on these exercises today.