Addition Color by Number Worksheets - Nature Inspired Learning - Free Printable

Let’s solve each math problem in the turtle picture step by step. We’ll add the numbers together to find the answer for each section. Then we’ll match that answer to the color key at the bottom.

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Step 1: Solve all the addition problems

We’ll go one by one:

- 5 + 21 = 26
- 8 + 15 = 23
- 6 + 11 = 17
- 23 (already given — no math needed)
- 4 + 19 = 23
- 16 + 1 = 17
- 18 + 10 = 28
- 23 + 0 = 23
- 15 + 13 = 28
- 2 + 15 = 17
- 21 + 2 = 23
- 13 + 10 = 23
- 6 + 17 = 23
- 5 + 12 = 17
- 20 + 8 = 28
- 14 + 14 = 28
- 11 + 17 = 28
- 19 + 9 = 28
- 10 + 2 = 12
- 8 + 20 = 28
- 12 + 11 = 23
- 22 + 6 = 28

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Step 2: Match answers to colors using the key

Color Key:
- Dark Green → 23
- Orange → 12
- Brown → 17
- Light Green → 28
- Blue → 26

Now let’s assign colors based on our answers:

- Any section with 26 → Blue (only one: 5+21)
- Any section with 23 → Dark Green (many sections: 8+15, 23, 4+19, 23+0, 21+2, 13+10, 6+17, 12+11)
- Any section with 17 → Brown (6+11, 16+1, 2+15, 5+12)
- Any section with 28 → Light Green (18+10, 15+13, 20+8, 14+14, 11+17, 19+9, 8+20, 22+6)
- Any section with 12 → Orange (only one: 10+2 — the starfish)

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Final Answer:

Here’s what to color each part:

- The very top left number (5 + 21 = 26) → Blue
- All sections that equal 23 → Dark Green
- All sections that equal 17 → Brown
- All sections that equal 28 → Light Green
- The starfish (10 + 2 = 12) → Orange

You can now color your turtle and sea friends using these rules! 🐢