4 Free Math Worksheets Second Grade 2 Addition Add 3 Single Digit ... - Free Printable

This is a color-by-number math worksheet designed for children. The goal is to solve simple addition and subtraction problems, then color the corresponding parts of the image based on the answers.

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🔍 Step-by-step Solution:

#### 1. Understand the Key:
On the left side, numbers from 1 to 8 are listed with different colored squiggles next to them. Each number corresponds to a color:
- 1 = Black
- 2 = Brown
- 3 = Orange
- 4 = Yellow
- 5 = Red
- 6 = Green
- 7 = Light Green (or Lime)
- 8 = Blue

So, we need to:
- Solve each math problem in the image.
- Match the answer to the correct number.
- Color that section using the associated color.

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#### 2. Solve All Math Problems:

Let’s go through all the expressions in the image and calculate their values.

| Expression | Result |
|----------|--------|
| 1+2 | 3 |
| 3 | 3 |
| 5+4 | 9 |
| 7+2 | 9 |
| 1+8 | 9 |
| 2+1 | 3 |
| 4-1 | 3 |
| 6+3 | 9 |
| 2+7 | 9 |
| 3+6 | 9 |
| 1+5 | 6 |
| 4+2 | 6 |
| 7-1 | 6 |
| 2+4 | 6 |
| 1+5 | 6 |
| 3+3 | 6 |
| 2+4 | 6 |
| 2+4 | 6 |
| 4+1 | 5 |
| 2+3 | 5 |
| 6-1 | 5 |
| 1+1 | 2 |
| 2+1 | 3 |
| 4+5 | 9 |
| 5+1 | 6 |
| 4-2 | 2 |
| 5-2 | 3 |
| 1+8 | 9 |
| 8+1 | 9 |
| 3+2 | 5 |
| 7-2 | 5 |
| 1+4 | 5 |
| 7+1 | 8 |
| 3+4 | 7 |
| 2+6 | 8 |
| 6+2 | 8 |
| 8-1 | 7 |
| 5-1 | 4 |
| 3+1 | 4 |
| 2+2 | 4 |
| 1+2 | 3 |
| 2+6 | 8 |
| 4+3 | 7 |
| 1+7 | 8 |

Now let's organize these results by the number they equal:

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✔ Final Answer Mapping:

We now assign colors based on the number:

| Number | Color | Expressions That Equal This |
|--------|-------------|-------------------------------|
| 1 | Black | None (no expression equals 1) |
| 2 | Brown | 1+1, 4-2, 2+1, 1+1 (on dog) |
| 3 | Orange | 1+2, 2+1, 4-1, 5-2, 1+2, 2+1 (dog ear), 2+1 (dog head) |
| 4 | Yellow | 5-1, 3+1, 2+2 |
| 5 | Red | 4+1, 2+3, 6-1, 3+2, 7-2, 1+4 |
| 6 | Green | 1+5, 4+2, 7-1, 2+4, 1+5, 3+3, 2+4, 2+4, 5+1, 4+1, 2+3, 6-1 |
| 7 | Light Green | 3+4, 8-1, 4+3 |
| 8 | Blue | 7+1, 2+6, 6+2, 2+6, 1+7 |

Wait — actually, some expressions result in 9, which is not in the key (only 1–8). But look at the clouds above the doghouse:
- 3, 1+2 → 3
- 5+4=9, 7+2=9, 1+8=9, 2+1=3, 4-1=3, 6+3=9, 2+7=9

But 9 is not in the key. So likely, the image has an error, or we’re supposed to ignore any answers outside 1–8?

Wait — let’s double-check:
Are there any expressions that result in 1, 2, 3, ..., 8?

Yes, but many give 9, like 5+4=9, 7+2=9, etc. Since 9 isn’t in the key, perhaps the key is missing 9, or maybe these are meant to be ignored? Or maybe it’s a mistake.

But looking closely — the doghouse and dog have only expressions that evaluate to 1–8.

Let’s recheck all expressions again carefully.

Wait! Let’s check all expressions in the image:

🧮 Recalculate All Expressions Carefully:

List all expressions in the image:

- Clouds:
- 3 → 3
- 1+2 → 3
- 5+4 → 9
- 7+2 → 9
- 1+8 → 9
- 2+1 → 3
- 4-1 → 3
- 6+3 → 9
- 2+7 → 9
- 4+5 → 9
- 2+2 → 4
- 1+1 → 2
- 2+1 → 3
- 4-2 → 2
- 5-2 → 3
- 1+8 → 9
- 8+1 → 9
- 3+2 → 5
- 7-2 → 5
- 1+4 → 5
- 7+1 → 8
- 3+4 → 7
- 2+6 → 8
- 6+2 → 8
- 8-1 → 7
- 5-1 → 4
- 3+1 → 4
- 2+2 → 4
- 1+2 → 3
- 2+6 → 8
- 4+3 → 7
- 1+7 → 8
- 1+3 → 4
- 5+4 → 9
- 3+2 → 5
- 2+1 → 3
- 4+2 → 6
- 7-1 → 6
- 2+4 → 6
- 1+5 → 6
- 3+3 → 6
- 2+4 → 6
- 2+4 → 6
- 4+1 → 5
- 2+3 → 5
- 6-1 → 5
- 5+1 → 6
- 4-2 → 2
- 5-2 → 3
- 1+8 → 9
- 5-1 → 4
- 3+1 → 4
- 2+2 → 4
- 1+1 → 2
- 2+6 → 8
- 4+3 → 7
- 1+7 → 8

Now group by result:

| Result | Expressions |
|--------|-------------|
| 1 | None |
| 2 | 1+1, 4-2, 2+1 (dog), 1+1 (dog), 2+1 (dog), 4-2 (dog) → multiple |
| 3 | 3, 1+2, 2+1, 4-1, 5-2, 1+2, 2+1 (dog), 2+1 (dog), 2+1 (dog), 2+1 (dog) |
| 4 | 2+2, 5-1, 3+1, 2+2, 1+3, 5-1, 3+1, 2+2 |
| 5 | 4+1, 2+3, 6-1, 3+2, 7-2, 1+4, 3+2, 7-2, 1+4 |
| 6 | 1+5, 4+2, 7-1, 2+4, 1+5, 3+3, 2+4, 2+4, 5+1, 4+2, 7-1, 2+4, 1+5, 3+3, 2+4, 2+4, 5+1 |
| 7 | 3+4, 8-1, 4+3, 3+4, 8-1, 4+3 |
| 8 | 7+1, 2+6, 6+2, 2+6, 1+7, 7+1, 2+6, 6+2, 2+6, 1+7 |
| 9 | 5+4, 7+2, 1+8, 6+3, 2+7, 4+5, 8+1, 1+8, 5+4 |

⚠️ Problem: Many expressions equal 9, but 9 is not in the color key (only 1–8).

So either:
- The key is incomplete.
- Or the expressions in clouds are not meant to be colored?
- Or some expressions are wrong?

But notice: the dog and doghouse have only expressions that result in 1–8.

Also, most of the 9s are in the cloud area, possibly just decorative or for older kids.

But the main coloring areas (dog, house, grass) mostly use 1–8.

Let’s assume the intended range is 1–8, and the 9s are errors or distractions.

But wait — look at "3" in the top-left cloud: it’s just "3", so it's already the answer.

So the idea is: if you see “3”, color it with orange (since 3=orange).

Similarly, if you see “1+2”, solve it → 3 → orange.

So even though some expressions give 9, they may not be part of the coloring regions.

Let’s focus only on the sections of the drawing that have math problems.

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✔ Final Coloring Guide:

Based on the drawing, here's what to do:

| Number | Color | Areas to Color |
|--------|-------------|----------------|
| 1 | Black | None (no 1) |
| 2 | Brown | 1+1, 4-2, 2+1 (dog), 1+1 (dog) |
| 3 | Orange | 3, 1+2, 2+1, 4-1, 5-2, 1+2, 2+1 (dog), 2+1 (dog) |
| 4 | Yellow | 2+2, 5-1, 3+1, 1+3, 2+2 |
| 5 | Red | 4+1, 2+3, 6-1, 3+2, 7-2, 1+4 |
| 6 | Green | 1+5, 4+2, 7-1, 2+4, 3+3, 5+1, 4+2, 7-1, 2+4, 3+3, 5+1 |
| 7 | Light Green | 3+4, 8-1, 4+3 |
| 8 | Blue | 7+1, 2+6, 6+2, 1+7 |

Note: Some expressions appear multiple times (e.g., 2+4 appears several times), so those sections should all be colored the same.

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🎨 How to Use This:

1. Find each math expression in the image.
2. Solve it.
3. Match the answer to the number on the left.
4. Color the region with the corresponding color.

For example:
- If a section says 1+5, solve → 6 → color green.
- If it says 2+6, solve → 8 → color blue.
- If it says 3, no calculation needed → 3 → color orange.

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❗ Important Note:

The expressions that evaluate to 9 (like 5+4, 7+2, etc.) are not in the key, so they should not be colored unless the key includes 9 (which it doesn't). Possibly, these are just for fun or for advanced students.

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✔ Final Answer Summary:

| Number | Color | Examples of Expressions |
|--------|-------------|-------------------------|
| 1 | Black | None |
| 2 | Brown | 1+1, 4-2, 2+1 |
| 3 | Orange | 3, 1+2, 2+1, 4-1, 5-2 |
| 4 | Yellow | 2+2, 5-1, 3+1, 1+3 |
| 5 | Red | 4+1, 2+3, 6-1, 3+2, 7-2, 1+4 |
| 6 | Green | 1+5, 4+2, 7-1, 2+4, 3+3, 5+1 |
| 7 | Light Green | 3+4, 8-1, 4+3 |
| 8 | Blue | 7+1, 2+6, 6+2, 1+7 |

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🖌️ Instructions for Coloring:

1. Print or draw the image.
2. Solve each math problem.
3. Color each section according to the number-key.
4. Enjoy your colorful dog and doghouse!

> 💡 Tip: Start with the easiest ones (like 1+1 = 2 → brown), and work your way up.

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✔ Conclusion:
This is a fun educational activity combining math and art. The solution involves solving basic arithmetic and matching answers to colors. Most expressions yield numbers 1–8, and the coloring key is complete for those. Ignore any expressions that give 9 unless instructed otherwise.

Would you like me to generate a printable version or a completed coloring guide?