Subtraction Facts Worksheets 1st Grade - Free Printable

It looks like you've uploaded an image of a subtraction worksheet titled *"Subtraction Up to 12 Sheet 1 Answers"*, which includes 24 subtraction problems with answers already filled in. Let's go through the solution and explanation for this worksheet.

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🔍 Overview of the Worksheet

This is a basic arithmetic practice sheet designed to help students master subtraction facts up to 12. The problems involve subtracting small numbers from numbers up to 12.

Each problem follows the format:
Minuend – Subtrahend = Difference

For example:
3 - 2 = 1, not 5 (but wait — there’s a mistake here!)

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✘ Issue: Some Answers Are Incorrect

Let’s check a few of the answers:

| Problem | Given Answer | Correct Answer |
|--------|---------------|----------------|
| 1) 3 - 2 = ? | 5 | ✔ Should be 1 |
| 2) 5 - 1 = ? | 6 | ✔ Should be 4 |
| 3) 8 - 0 = ? | 8 | ✔ Correct |
| 4) 4 - 1 = ? | 3 | ✔ Correct |
| 5) 5 - 2 = ? | 3 | ✔ Correct |
| 6) 6 - 3 = ? | 3 | ✔ Correct |
| 7) 9 - 2 = ? | 7 | ✔ Correct |
| 8) 10 - 1 = ? | 9 | ✔ Correct |
| 9) 5 - 4 = ? | 1 | ✔ Correct |
| 10) 8 - 2 = ? | 6 | ✔ Correct |
| 11) 10 - 2 = ? | 8 | ✔ Correct |
| 12) 11 - 1 = ? | 10 | ✔ Correct |

Now check the second column:

| Problem | Given Answer | Correct Answer |
|--------|---------------|----------------|
| 13) 9 - 3 = ? | 6 | ✔ Correct |
| 14) 7 - 4 = ? | 3 | ✔ Correct |
| 15) 11 - 2 = ? | 9 | ✔ Correct |
| 16) 8 - 4 = ? | 4 | ✔ Correct |
| 17) 5 - 5 = ? | 0 | ✔ Correct |
| 18) 7 - 5 = ? | 2 | ✔ Correct |
| 19) 8 - 5 = ? | 3 | ✔ Correct |
| 20) 12 - 3 = ? | 9 | ✔ Correct |
| 21) 7 - 7 = ? | 0 | ✔ Correct |
| 22) 8 - 7 = ? | 1 | ✔ Correct |
| 23) 6 - 5 = ? | 1 | ✔ Correct |
| 24) 9 - 6 = ? | 3 | ✔ Correct |

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⚠️ Critical Error Found

The first two answers are wrong:

- 1) 3 - 2 = 5 → ✘ Incorrect
✔ Correct: 3 - 2 = 1
- 2) 5 - 1 = 6 → ✘ Incorrect
✔ Correct: 5 - 1 = 4

All other answers are correct.

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✔ Key Question Explanation

> "What happens when you take away the number you start with (e.g., 5 – 5, 7 – 7)?"

Answer: The answer is always zero.

✔ This is because:
- If you subtract a number from itself, you are removing all of it.
- Example: 5 - 5 = 0, 7 - 7 = 0, 12 - 12 = 0
- This reflects the identity property of subtraction:
$ a - a = 0 $

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📝 Summary

- Most answers on the worksheet are correct, but the first two are wrong.
- The correct answers should be:
1) 3 - 2 = 1
2) 5 - 1 = 4
- The key concept taught is that subtracting a number from itself results in zero.

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✔ Final Correction (Corrected Answers)

Here are the corrected answers:

1) 3 - 2 = 1
2) 5 - 1 = 4
3) 8 - 0 = 8
4) 4 - 1 = 3
5) 5 - 2 = 3
6) 6 - 3 = 3
7) 9 - 2 = 7
8) 10 - 1 = 9
9) 5 - 4 = 1
10) 8 - 2 = 6
11) 10 - 2 = 8
12) 11 - 1 = 10
13) 9 - 3 = 6
14) 7 - 4 = 3
15) 11 - 2 = 9
16) 8 - 4 = 4
17) 5 - 5 = 0
18) 7 - 5 = 2
19) 8 - 5 = 3
20) 12 - 3 = 9
21) 7 - 7 = 0
22) 8 - 7 = 1
23) 6 - 5 = 1
24) 9 - 6 = 3

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🧠 Teaching Tip

Use visual aids like number lines or counters to help students understand:
- What happens when you remove part of a group.
- Why subtracting a number from itself gives zero.

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Let me know if you'd like a printable version of the corrected worksheet!