Decimal addition and subtraction practice worksheet with 24 problems.

Problem Description:

The task involves performing arithmetic operations (addition and subtraction) on decimal numbers. Each row contains a series of calculations, and the goal is to compute the results for each operation.

Solution Approach:

1. Identify the Operations: Each cell in the grid contains a starting number followed by an addition or subtraction operation with another number.
2. Perform Calculations:
- For addition (`+`), add the two numbers.
- For subtraction (`-`), subtract the second number from the first.
3. Organize Results: Compute each result step-by-step and ensure accuracy by handling decimal places correctly.

Step-by-Step Calculation:

#### First Row:
1. \( 46.38 - 43.15 = 3.23 \)
2. \( 19.54 + 98.37 = 117.91 \)
3. \( 18.16 + 48.74 = 66.90 \)
4. \( 88.14 + 52.28 = 140.42 \)
5. \( 61.45 - 18.89 = 42.56 \)
6. \( 82.43 + 41.71 = 124.14 \)

#### Second Row:
1. \( 67.99 - 20.16 = 47.83 \)
2. \( 72.31 - 57.73 = 14.58 \)
3. \( 91.84 + 23.38 = 115.22 \)
4. \( 42.44 + 66.24 = 108.68 \)
5. \( 23.53 + 42.76 = 66.29 \)
6. \( 98.62 - 52.31 = 46.31 \)

#### Third Row:
1. \( 65.75 - 55.91 = 9.84 \)
2. \( 40.74 + 17.38 = 58.12 \)
3. \( 22.13 + 58.51 = 80.64 \)
4. \( 84.47 - 70.84 = 13.63 \)
5. \( 62.97 - 51.27 = 11.70 \)
6. \( 12.92 + 32.53 = 45.45 \)

#### Fourth Row:
1. \( 83.84 - 65.13 = 18.71 \)
2. \( 58.82 + 66.25 = 125.07 \)
3. \( 49.53 - 31.24 = 18.29 \)
4. \( 97.49 - 81.84 = 15.65 \)
5. \( 25.95 + 44.81 = 70.76 \)
6. \( 65.42 - 60.96 = 4.46 \)

Final Results:

Organizing the results into a grid format:

| Operation Result |
|------------------------|
| 3.23, 117.91, 66.90, 140.42, 42.56, 124.14 |
| 47.83, 14.58, 115.22, 108.68, 66.29, 46.31 |
| 9.84, 58.12, 80.64, 13.63, 11.70, 45.45 |
| 18.71, 125.07, 18.29, 15.65, 70.76, 4.46 |

Final Answer:

\[
\boxed{
\begin{array}{cccccc}
3.23 & 117.91 & 66.90 & 140.42 & 42.56 & 124.14 \\
47.83 & 14.58 & 115.22 & 108.68 & 66.29 & 46.31 \\
9.84 & 58.12 & 80.64 & 13.63 & 11.70 & 45.45 \\
18.71 & 125.07 & 18.29 & 15.65 & 70.76 & 4.46 \\
\end{array}
}
\]