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Addition within 20 Color by Number — Bunny with a Smiling Carrot

Interactive worksheet with auto-grading, instant feedback, and printable PDF.

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Grades 1–2MathInteractive · Printable

Aligned to1.OA.C.62.OA.B.2

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2 Common Core standards

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About this worksheet

1-Digit Addition (within 20) Color by Number turns a key addition skill into a picture students actually want to finish. Students solve each problem, match the answer to the color key, and a hidden picture appears region by region. It builds fluency with addition facts to 20, including bridging through ten. Built for Grades 1–2 and aligned to 1.OA.C.6, 2.OA.B.2. No-prep and self-checking, it's ready for math centers, morning work, early finishers, or homework — and every download includes a print-ready PDF plus an interactive version with the answer key.

Curriculum

Common Core standards covered

1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

2.OA.B.2

Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.

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