True Number Sentences Worksheet - Free Printable

Let's solve each of these number sentences step by step to make them true. We need to find the missing number that makes both sides of the equation equal.

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1) 4 + ___ = 6 + 3

- Right side: 6 + 3 = 9
- So, 4 + x = 9 → x = 5
✔ Answer: 5

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2) 7 + 3 = 11 - ___

- Left side: 7 + 3 = 10
- So, 11 - x = 10 → x = 1
✔ Answer: 1

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3) 2 + 6 = ___ + 1

- Left side: 2 + 6 = 8
- So, x + 1 = 8 → x = 7
✔ Answer: 7

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4) 7 + 4 = 10 + ___

- Left side: 7 + 4 = 11
- So, 10 + x = 11 → x = 1
✔ Answer: 1

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5) ___ + 5 = 12 + 0

- Right side: 12 + 0 = 12
- So, x + 5 = 12 → x = 7
✔ Answer: 7

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6) 10 + ___ = 20 - 5

- Right side: 20 - 5 = 15
- So, 10 + x = 15 → x = 5
✔ Answer: 5

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7) 13 - 5 = ___ + 4

- Left side: 13 - 5 = 8
- So, x + 4 = 8 → x = 4
✔ Answer: 4

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8) 13 - ___ = 5 + 7

- Right side: 5 + 7 = 12
- So, 13 - x = 12 → x = 1
✔ Answer: 1

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9) 10 + ___ = 14 - 3

- Right side: 14 - 3 = 11
- So, 10 + x = 11 → x = 1
✔ Answer: 1

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10) 6 + ___ = 7 + 8

- Right side: 7 + 8 = 15
- So, 6 + x = 15 → x = 9
✔ Answer: 9

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11) 3 + 5 = 10 - ___

- Left side: 3 + 5 = 8
- So, 10 - x = 8 → x = 2
✔ Answer: 2

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12) 14 - 7 = ___ + 3

- Left side: 14 - 7 = 7
- So, x + 3 = 7 → x = 4
✔ Answer: 4

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13) 13 - 5 = ___ - 8

- Left side: 13 - 5 = 8
- So, x - 8 = 8 → x = 16
✔ Answer: 16

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14) ___ + 9 = 6 + 5

- Right side: 6 + 5 = 11
- So, x + 9 = 11 → x = 2
✔ Answer: 2

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15) 7 + 3 = 5 + ___

- Left side: 7 + 3 = 10
- So, 5 + x = 10 → x = 5
✔ Answer: 5

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16) 5 + ___ = 8 + 0

- Right side: 8 + 0 = 8
- So, 5 + x = 8 → x = 3
✔ Answer: 3

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17) ___ + 7 = 8 + 6

- Right side: 8 + 6 = 14
- So, x + 7 = 14 → x = 7
✔ Answer: 7

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18) 11 + 5 = 3 + ___

- Left side: 11 + 5 = 16
- So, 3 + x = 16 → x = 13
✔ Answer: 13

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19) 3 + 6 = 1 + ___

- Left side: 3 + 6 = 9
- So, 1 + x = 9 → x = 8
✔ Answer: 8

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20) 9 + ___ = 20 - 8

- Right side: 20 - 8 = 12
- So, 9 + x = 12 → x = 3
✔ Answer: 3

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✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 1) | 5 |
| 2) | 1 |
| 3) | 7 |
| 4) | 1 |
| 5) | 7 |
| 6) | 5 |
| 7) | 4 |
| 8) | 1 |
| 9) | 1 |
| 10) | 9 |
| 11) | 2 |
| 12) | 4 |
| 13) | 16 |
| 14) | 2 |
| 15) | 5 |
| 16) | 3 |
| 17) | 7 |
| 18) | 13 |
| 19) | 8 |
| 20) | 3 |

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📝 Explanation:

Each problem requires balancing both sides of the equation. The key is:
- First, evaluate the known side (the one without the blank).
- Then, solve for the missing number using basic arithmetic (addition or subtraction).
- This reinforces understanding of equality, number sense, and basic operations.

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