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Two pages: the worksheet, then the answer key.
Teaching notes for subtraction within 20
Subtracting across a ten, like 15 - 8, is reliably slower than the matching addition. Ask your child to name the addition partner first; the subtraction usually follows.
How to use this sheet
- 1. Solve the problem printed inside each region of the picture.
- 2. Find that answer in the color key at the top of the sheet.
- 3. Color the region with the crayon next to it. Each swatch also carries a letter code, so the sheet still works printed in black and white.
The picture only comes out right if the facts were answered right, which is the point: a guessed answer shows up as a wrong color instead of disappearing into a page of ticks.
After the subtraction within 20 sheet
A coloring sheet is deliberate, slow practice — good for a first pass and for the facts that are still shaky. Recall speed comes from short repeated retrieval, so pair it with a few minutes of online practice rather than another sheet.
Other addition and subtraction sets
Frequently Asked Questions
Working within 20 is usually a 1st and 2nd grade target. These facts cross a ten, which is the step that makes them slower than facts within 10.
Each region of the picture shows one subtraction within 20 problem. Solve it, find that answer in the color key at the top of the sheet, and color the region with the crayon next to it. A finished picture only looks right if every fact was answered correctly.
Yes. There is no signup, no email gate, and no download. Choose a picture, press Print, and print it or save it as a PDF from your browser. The answer key prints on its own page after the worksheet.
Use the picture switcher above the sheet to regenerate this subtraction within 20 worksheet on any of the 9 pictures, or open the color by code generator to change the operation and fact set as well.