Comprehensive worksheet designed to help students practice two-digit addition and subtraction through vertical calculation exercises.

Problem Description:

The task involves solving a series of two-digit addition and subtraction problems. Each row contains multiple operations, and the goal is to compute the results for each operation.

Solution Approach:

1. Identify Each Operation: Each row contains a sequence of addition (`+`) and subtraction (`-`) operations.
2. Perform Calculations: Solve each operation step by step.
3. Organize Results: Write down the results for each operation in the corresponding position.

Step-by-Step Solution:

#### Row 1:
- \( 65 + 90 = 155 \)
- \( 34 - 11 = 23 \)
- \( 72 + 71 = 143 \)
- \( 54 - 22 = 32 \)
- \( 74 + 25 = 99 \)
- \( 28 - 11 = 17 \)
- \( 65 + 84 = 149 \)

#### Row 2:
- \( 57 - 57 = 0 \)
- \( 17 + 78 = 95 \)
- \( 64 - 64 = 0 \)
- \( 47 - 15 = 32 \)
- \( 60 - 57 = 3 \)
- \( 78 - 10 = 68 \)
- \( 59 + 29 = 88 \)

#### Row 3:
- \( 56 + 73 = 129 \)
- \( 77 - 64 = 13 \)
- \( 59 + 48 = 107 \)
- \( 48 + 32 = 80 \)
- \( 38 - 11 = 27 \)
- \( 59 + 37 = 96 \)
- \( 24 - 18 = 6 \)

#### Row 4:
- \( 77 - 15 = 62 \)
- \( 16 - 10 = 6 \)
- \( 42 - 16 = 26 \)
- \( 88 + 76 = 164 \)
- \( 42 - 25 = 17 \)
- \( 11 + 95 = 106 \)
- \( 63 - 21 = 42 \)

#### Row 5:
- \( 20 - 15 = 5 \)
- \( 57 + 51 = 108 \)
- \( 75 - 75 = 0 \)
- \( 87 + 37 = 124 \)
- \( 66 + 76 = 142 \)
- \( 47 + 42 = 89 \)
- \( 56 + 36 = 92 \)

#### Row 6:
- \( 39 + 56 = 95 \)
- \( 55 + 18 = 73 \)
- \( 59 - 53 = 6 \)
- \( 96 + 99 = 195 \)
- \( 73 - 27 = 46 \)
- \( 32 - 22 = 10 \)
- \( 71 - 34 = 37 \)

#### Row 7:
- \( 88 + 99 = 187 \)
- \( 95 + 42 = 137 \)
- \( 50 - 46 = 4 \)
- \( 75 + 48 = 123 \)
- \( 14 + 43 = 57 \)
- \( 58 - 49 = 9 \)
- \( 35 + 85 = 120 \)

Final Results:

\[
\begin{array}{ccccccc}
155 & 23 & 143 & 32 & 99 & 17 & 149 \\
0 & 95 & 0 & 32 & 3 & 68 & 88 \\
129 & 13 & 107 & 80 & 27 & 96 & 6 \\
62 & 6 & 26 & 164 & 17 & 106 & 42 \\
5 & 108 & 0 & 124 & 142 & 89 & 92 \\
95 & 73 & 6 & 195 & 46 & 10 & 37 \\
187 & 137 & 4 & 123 & 57 & 9 & 120 \\
\end{array}
\]

Final Answer:

\[
\boxed{
\begin{array}{ccccccc}
155 & 23 & 143 & 32 & 99 & 17 & 149 \\
0 & 95 & 0 & 32 & 3 & 68 & 88 \\
129 & 13 & 107 & 80 & 27 & 96 & 6 \\
62 & 6 & 26 & 164 & 17 & 106 & 42 \\
5 & 108 & 0 & 124 & 142 & 89 & 92 \\
95 & 73 & 6 & 195 & 46 & 10 & 37 \\
187 & 137 & 4 & 123 & 57 & 9 & 120 \\
\end{array}
}
\]