Chalkboard Subtraction to 20 Color by Number
An illustrated color-by-number worksheet with a classroom chalkboard with colorful chalk shapes, an eraser, a potted plant and a waste basket. Solve the subtraction problem (numbers up to 20) in each space and color it by the answer to reveal the full picture. Great for first and second grade.
- Size
- US Letter (8.5 × 11 in), fits A4
- Vector, prints razor-sharp at any size
- PNG
- 2550 × 3300 px, 300 DPI
- License
- Free for personal & classroom use
About this coloring page
An illustrated color-by-number worksheet with a classroom chalkboard with colorful chalk shapes, an eraser, a potted plant and a waste basket. Solve the subtraction problem (numbers up to 20) in each space and color it by the answer to reveal the full picture. It is a good page for first graders who know their facts to 10 and are ready for bigger numbers. Check each answer by adding it back to the number taken away.
This page by the numbers
The picture has 35 numbered spaces, colored with 9 crayon colors. Green (number 3) fills the most spaces: 10 of them. Pink (number 12) is used the least, with 1. Every answer is a number from 3 to 12, so each answer matches one color in the key.
- 3 = green: 10 spaces
- 4 = yellow: 6 spaces
- 6 = brown: 6 spaces
- 7 = orange: 3 spaces
- 8 = blue: 3 spaces
- 9 = red: 2 spaces
- 10 = light blue: 2 spaces
- 11 = white: 2 spaces
- 12 = pink: 1 space
Coloring ideas
- Count back on your fingers or the number line for the hardest facts.
- Follow the color key exactly to see the mystery picture appear.
- Use markers for bold, even squares.
- Color one number at a time: find all the 1s, then all the 2s, and so on.
Printing tips
Download the PDF for the sharpest result and print at 100% (or “fit to page” on A4). The PNG is 300 DPI, which is handy for tablets and coloring apps. This page is free for personal, family and classroom use.
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