Add the numbers.
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Free printable number line subtraction worksheets for first grade. Move left within 20, draw jumps, solve equations, and print answer keys.
Grade 1 · subtraction within 20. This printable activity gives children something concrete to count, color, draw, cross out, match, or explain. It provides focused practice for 1.OA.C.5–6 and a matching answer key for the exact generated set.
Number-line subtraction treats subtraction as movement to the left. Children follow a shown jump or draw their own, then connect the landing point to a subtraction equation within 20.
Start on the larger number, count each move to the left, and circle the landing number. Recount the spaces if the drawn jump and written difference disagree.
Read the first direction together and let the child complete the physical action before writing a number. Ask, “How do you know?” after one item. That short explanation reveals whether the picture, model, and equation make sense together. Use crayons, a pencil, small counters, or a straightedge when the activity calls for them.
Select New problems to make a fresh set with new numbers or pictures. Switch between Worksheet and Answer key to preview both pages. The selected worksheet and answer key use the same set, so every answer stays aligned. Choose either page or both in the print controls, then print on US Letter or A4 paper. A browser print dialog can also save the activity as a PDF.
The worksheet is free for home practice, tutoring, and classroom use. Begin with a level the learner can complete accurately, then generate a new set for another short session. Hands-on work should support mathematical thinking, so accuracy and a clear explanation matter more than speed.
Start · jump left · subtract.
Generate, preview, and print the worksheet with its matching answer key.