This "100+ Days of Timed Tests - Addition and Subtraction, Facts 0 to 9, Single Digit" is the beginner-level math practice workbook for Kindergarten and Grade 1 kids. This book is specifically designed for numbers between 0 and 9. These sets of math practice worksheets are designed to test simple addition and subtraction problem-solving skills. The kids can challenge themselves with the timed test problems. This book mainly focuses on improving math facts skills, speed, and building confidence l