Included are 35 Google Slides that will allow students to practice subtracting within 20 with number lines. Students will drag and drop the dot to help them subtract and then type the answer into the box or record it on the included recording sheet. Standards Covered: CCSS.MATH.CONTENT.1.OA.A.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using