1st Grade Mixed Practice Math Worksheet with Addition and Subtraction Problems

Problem Description:

The worksheet is a 1st Grade Math Worksheet that involves basic arithmetic operations: addition and subtraction. The tasks are divided into two sections:
1. Find the sum: Perform addition.
2. Find the difference: Perform subtraction.

Solution:

#### Section 1: Find the sum
We need to add the numbers in each pair.

1. \( 1 + 1 = 2 \)
2. \( 1 + 2 = 3 \)
3. \( 1 + 3 = 4 \)
4. \( 1 + 4 = 5 \)
5. \( 1 + 5 = 6 \)
6. \( 8 + 2 = 10 \)
7. \( 1 + 7 = 8 \)
8. \( 2 + 8 = 10 \)
9. \( 1 + 9 = 10 \)
10. \( 5 + 4 = 9 \)
11. \( 2 + 1 = 3 \)
12. \( 2 + 2 = 4 \)
13. \( 7 + 3 = 10 \)
14. \( 2 + 4 = 6 \)
15. \( 2 + 5 = 7 \)
16. \( 4 + 6 = 10 \)
17. \( 2 + 7 = 9 \)
18. \( 2 + 8 = 10 \)
19. \( 6 + 0 = 6 \)
20. \( 3 + 1 = 4 \)
21. \( 3 + 2 = 5 \)

#### Section 2: Find the difference
We need to subtract the second number from the first number in each pair.

1. \( 3 - 1 = 2 \)
2. \( 4 - 2 = 2 \)
3. \( 3 - 3 = 0 \)
4. \( 5 - 4 = 1 \)
5. \( 5 - 1 = 4 \)
6. \( 4 - 2 = 2 \)
7. \( 5 - 3 = 2 \)
8. \( 8 - 4 = 4 \)
9. \( 7 - 5 = 2 \)
10. \( 9 - 1 = 8 \)
11. \( 7 - 2 = 5 \)
12. \( 6 - 3 = 3 \)
13. \( 4 - 4 = 0 \)
14. \( 6 - 5 = 1 \)
15. \( 6 - 6 = 0 \)
16. \( 7 - 1 = 6 \)
17. \( 7 - 2 = 5 \)
18. \( 8 - 1 = 7 \)
19. \( 8 - 2 = 6 \)
20. \( 9 - 0 = 9 \)
21. \( 9 - 1 = 8 \)

Final Answers:

#### Sum:
\[
\begin{aligned}
&2, 3, 4, 5, 6, 10, 8, 10, 10, 9, 3, 4, 10, 6, 7, 10, 9, 10, 6, 4, 5 \\
\end{aligned}
\]

#### Difference:
\[
\begin{aligned}
&2, 2, 0, 1, 4, 2, 2, 4, 2, 8, 5, 3, 0, 1, 0, 6, 5, 7, 6, 9, 8 \\
\end{aligned}
\]

Boxed Final Answer:

\[
\boxed{
\text{Sum: } 2, 3, 4, 5, 6, 10, 8, 10, 10, 9, 3, 4, 10, 6, 7, 10, 9, 10, 6, 4, 5 \\
\text{Difference: } 2, 2, 0, 1, 4, 2, 2, 4, 2, 8, 5, 3, 0, 1, 0, 6, 5, 7, 6, 9, 8
}
\]