Math worksheet for adding and subtracting integers with practice problems and solutions.

Problem Analysis:

The task involves solving a series of arithmetic problems involving addition and subtraction. The problems are presented in a table format, and the goal is to compute the results for each operation.

Step-by-Step Solution:

#### 1. \( 2 + 7 \)
- Add 2 and 7.
- \( 2 + 7 = 9 \)

#### 2. \( 6 + 5 \)
- Add 6 and 5.
- \( 6 + 5 = 11 \)

#### 3. \( 40 + 30 \)
- Add 40 and 30.
- \( 40 + 30 = 70 \)

#### 4. \( 7 + 8 \)
- Add 7 and 8.
- \( 7 + 8 = 15 \)

#### 5. \( 7 + 16 \)
- Add 7 and 16.
- \( 7 + 16 = 23 \)

#### 6. \( 7 - 6 \)
- Subtract 6 from 7.
- \( 7 - 6 = 1 \)

#### 7. \( 7 - 30 \)
- Subtract 30 from 7.
- \( 7 - 30 = -23 \)

#### 8. \( 8 - 22 \)
- Subtract 22 from 8.
- \( 8 - 22 = -14 \)

#### 9. \( 7 - 11 \)
- Subtract 11 from 7.
- \( 7 - 11 = -4 \)

#### 10. \( 2 - 7 \)
- Subtract 7 from 2.
- \( 2 - 7 = -5 \)

#### 11. \( 9 + 8 = [Q] \)
- Add 9 and 8.
- \( 9 + 8 = 17 \)
- Therefore, \( Q = 17 \).

#### 12. \( [U] + 30 = 43 \)
- Let \( U \) be the unknown value.
- Solve for \( U \):
\[
U + 30 = 43
\]
\[
U = 43 - 30
\]
\[
U = 13
\]

#### 13. \( [Z] - 3 = 11 \)
- Let \( Z \) be the unknown value.
- Solve for \( Z \):
\[
Z - 3 = 11
\]
\[
Z = 11 + 3
\]
\[
Z = 14
\]

#### 14. \( [Z - 3] = 11 \)
- This is a restatement of the previous problem.
- From the solution above, \( Z = 14 \).
- Verify:
\[
Z - 3 = 14 - 3 = 11
\]
- Therefore, \( Z = 14 \).

Final Answers:

\[
\boxed{
\begin{array}{ll}
1. & 9 \\
2. & 11 \\
3. & 70 \\
4. & 15 \\
5. & 23 \\
6. & 1 \\
7. & -23 \\
8. & -14 \\
9. & -4 \\
10. & -5 \\
11. & 17 \\
12. & 13 \\
13. & 14 \\
14. & 14 \\
\end{array}
}
\]