Practice Addition & Subtraction - 1st Grade Math Worksheet ... - Free Printable

Problem Description:

The worksheet is a 1st Grade Math Worksheet focusing on 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. \( 3 + 2 = 5 \)
2. \( 3 + 4 = 7 \)
3. \( 3 + 5 = 8 \)
4. \( 3 + 6 = 9 \)
5. \( 3 + 7 = 10 \)
6. \( 4 + 1 = 5 \)
7. \( 4 + 2 = 6 \)
8. \( 4 + 3 = 7 \)
9. \( 4 + 4 = 8 \)
10. \( 4 + 5 = 9 \)
11. \( 5 + 4 = 9 \)
12. \( 5 + 5 = 10 \)
13. \( 6 + 1 = 7 \)
14. \( 6 + 2 = 8 \)
15. \( 6 + 3 = 9 \)
16. \( 6 + 4 = 10 \)
17. \( 7 + 1 = 8 \)

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

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

Final Answers:

#### Sum:
1. \( 5 \)
2. \( 7 \)
3. \( 8 \)
4. \( 9 \)
5. \( 10 \)
6. \( 5 \)
7. \( 6 \)
8. \( 7 \)
9. \( 8 \)
10. \( 9 \)
11. \( 9 \)
12. \( 10 \)
13. \( 7 \)
14. \( 8 \)
15. \( 9 \)
16. \( 10 \)
17. \( 8 \)

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

Boxed Final Answer:

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