Solve each addition fact, then color the square using its answer range.
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Free printable addition color by number worksheets within 20. Solve each fact, use the color key, generate new mosaics, and print answers.
Grades 1–2 · 1.OA.C.6; 2.OA.B.2. This page combines addition fluency with a simple coloring code. Sixteen facts create a short independent practice activity rather than a long drill.
Solve each addition fact, then color the square using its answer range. Use New problems to create another printable set while keeping the same activity and level.
Have the learner solve all facts lightly in pencil before coloring. Check an answer against the key once, then use the same range consistently. Switch to Answer key to check the exact same pictures and numbers. Choose the worksheet, the answer key, or both in the print controls. The activity is free to print for home or classroom use and is designed to fit on one US Letter or A4 page.
Keep the first session short and let the child explain one answer in words. A correct explanation shows whether the picture, number, or model makes sense. Generate a new set for another day instead of repeating memorized positions.
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