Addition and Subtraction Test worksheet with problems for finding sums and differences.

Problem Overview:

The task involves solving addition and subtraction problems. Let's break it down into two sections:

1. Find the sum: Perform addition for each pair of numbers.
2. Find the difference: Perform subtraction for each pair of numbers.

We will solve each problem step by step.

---

Section 1: Find the sum

#### Problem 1: \( 996 + 978 \)
\[
\begin{array}{r}
996 \\
+ 978 \\
\hline
1974 \\
\end{array}
\]
- Add the units place: \( 6 + 8 = 14 \). Write down 4 and carry over 1.
- Add the tens place: \( 9 + 7 + 1 = 17 \). Write down 7 and carry over 1.
- Add the hundreds place: \( 9 + 9 + 1 = 19 \). Write down 9 and carry over 1.
- Add the thousands place: \( 0 + 0 + 1 = 1 \).

Answer: \( 1974 \)

#### Problem 2: \( 896 + 968 \)
\[
\begin{array}{r}
896 \\
+ 968 \\
\hline
1864 \\
\end{array}
\]
- Add the units place: \( 6 + 8 = 14 \). Write down 4 and carry over 1.
- Add the tens place: \( 9 + 6 + 1 = 16 \). Write down 6 and carry over 1.
- Add the hundreds place: \( 8 + 9 + 1 = 18 \). Write down 8 and carry over 1.
- Add the thousands place: \( 0 + 0 + 1 = 1 \).

Answer: \( 1864 \)

#### Problem 3: \( 795 + 998 \)
\[
\begin{array}{r}
795 \\
+ 998 \\
\hline
1793 \\
\end{array}
\]
- Add the units place: \( 5 + 8 = 13 \). Write down 3 and carry over 1.
- Add the tens place: \( 9 + 9 + 1 = 19 \). Write down 9 and carry over 1.
- Add the hundreds place: \( 7 + 9 + 1 = 17 \). Write down 7 and carry over 1.
- Add the thousands place: \( 0 + 0 + 1 = 1 \).

Answer: \( 1793 \)

#### Problem 4: \( 598 + 958 \)
\[
\begin{array}{r}
598 \\
+ 958 \\
\hline
1556 \\
\end{array}
\]
- Add the units place: \( 8 + 8 = 16 \). Write down 6 and carry over 1.
- Add the tens place: \( 9 + 5 + 1 = 15 \). Write down 5 and carry over 1.
- Add the hundreds place: \( 5 + 9 + 1 = 15 \). Write down 5 and carry over 1.
- Add the thousands place: \( 0 + 0 + 1 = 1 \).

Answer: \( 1556 \)

#### Problem 5: \( 597 + 938 \)
\[
\begin{array}{r}
597 \\
+ 938 \\
\hline
1535 \\
\end{array}
\]
- Add the units place: \( 7 + 8 = 15 \). Write down 5 and carry over 1.
- Add the tens place: \( 9 + 3 + 1 = 13 \). Write down 3 and carry over 1.
- Add the hundreds place: \( 5 + 9 + 1 = 15 \). Write down 5 and carry over 1.
- Add the thousands place: \( 0 + 0 + 1 = 1 \).

Answer: \( 1535 \)

#### Problem 6: \( 596 + 928 \)
\[
\begin{array}{r}
596 \\
+ 928 \\
\hline
1524 \\
\end{array}
\]
- Add the units place: \( 6 + 8 = 14 \). Write down 4 and carry over 1.
- Add the tens place: \( 9 + 2 + 1 = 12 \). Write down 2 and carry over 1.
- Add the hundreds place: \( 5 + 9 + 1 = 15 \). Write down 5 and carry over 1.
- Add the thousands place: \( 0 + 0 + 1 = 1 \).

Answer: \( 1524 \)

---

Section 2: Find the difference

#### Problem 7: \( 926 - 658 \)
\[
\begin{array}{r}
926 \\
- 658 \\
\hline
268 \\
\end{array}
\]
- Subtract the units place: \( 6 - 8 \). Borrow 1 from the tens place, making it \( 16 - 8 = 8 \).
- Subtract the tens place: \( 1 (borrowed) - 5 = 2 - 5 \). Borrow 1 from the hundreds place, making it \( 12 - 5 = 7 \).
- Subtract the hundreds place: \( 8 (borrowed) - 6 = 2 \).

Answer: \( 268 \)

#### Problem 8: \( 835 - 368 \)
\[
\begin{array}{r}
835 \\
- 368 \\
\hline
467 \\
\end{array}
\]
- Subtract the units place: \( 5 - 8 \). Borrow 1 from the tens place, making it \( 15 - 8 = 7 \).
- Subtract the tens place: \( 2 (borrowed) - 6 = 3 - 6 \). Borrow 1 from the hundreds place, making it \( 12 - 6 = 6 \).
- Subtract the hundreds place: \( 7 (borrowed) - 3 = 4 \).

Answer: \( 467 \)

#### Problem 9: \( 956 - 598 \)
\[
\begin{array}{r}
956 \\
- 598 \\
\hline
358 \\
\end{array}
\]
- Subtract the units place: \( 6 - 8 \). Borrow 1 from the tens place, making it \( 16 - 8 = 8 \).
- Subtract the tens place: \( 4 (borrowed) - 9 = 5 - 9 \). Borrow 1 from the hundreds place, making it \( 14 - 9 = 5 \).
- Subtract the hundreds place: \( 8 (borrowed) - 5 = 3 \).

Answer: \( 358 \)

#### Problem 10: \( 923 - 567 \)
\[
\begin{array}{r}
923 \\
- 567 \\
\hline
356 \\
\end{array}
\]
- Subtract the units place: \( 3 - 7 \). Borrow 1 from the tens place, making it \( 13 - 7 = 6 \).
- Subtract the tens place: \( 1 (borrowed) - 6 = 2 - 6 \). Borrow 1 from the hundreds place, making it \( 11 - 6 = 5 \).
- Subtract the hundreds place: \( 8 (borrowed) - 5 = 3 \).

Answer: \( 356 \)

#### Problem 11: \( 753 - 378 \)
\[
\begin{array}{r}
753 \\
- 378 \\
\hline
375 \\
\end{array}
\]
- Subtract the units place: \( 3 - 8 \). Borrow 1 from the tens place, making it \( 13 - 8 = 5 \).
- Subtract the tens place: \( 4 (borrowed) - 7 = 5 - 7 \). Borrow 1 from the hundreds place, making it \( 14 - 7 = 7 \).
- Subtract the hundreds place: \( 6 (borrowed) - 3 = 3 \).

Answer: \( 375 \)

#### Problem 12: \( 823 - 386 \)
\[
\begin{array}{r}
823 \\
- 386 \\
\hline
437 \\
\end{array}
\]
- Subtract the units place: \( 3 - 6 \). Borrow 1 from the tens place, making it \( 13 - 6 = 7 \).
- Subtract the tens place: \( 1 (borrowed) - 8 = 2 - 8 \). Borrow 1 from the hundreds place, making it \( 11 - 8 = 3 \).
- Subtract the hundreds place: \( 7 (borrowed) - 3 = 4 \).

Answer: \( 437 \)

---

Final Answers:

\[
\boxed{
\begin{array}{l}
1974, 1864, 1793, 1556, 1535, 1524, \\
268, 467, 358, 356, 375, 437
\end{array}
}
\]