Place Value 1st Grade Math Worksheets Within 20 : Addition and Subtraction This math worksheet is for grade 1 students and includes 38 pages of addition and subtraction worksheets. We have divided the worksheets into 5 days and also included a bonus to increase the level of math fact practice. However, teachers can split the days or organize the worksheets themselves according to their needs. It can be used for the whole class, for independent work, homework, or other methods. That fits your cla