Math worksheet for adding numbers to reach multiples of ten, ideal for classroom or home learning.

Problem Overview:

The task involves filling in the blanks for each equation so that the sum equals the given total. The equations are structured as additions involving multiples of ten, and the goal is to determine the missing number in each equation.

Solution Approach:

1. Identify the Structure: Each equation is of the form `A + B = C`, where `A` or `B` is missing, and `C` is the total.
2. Use Basic Addition/Subtraction: To find the missing number:
- If `A` is missing: \( A = C - B \)
- If `B` is missing: \( B = C - A \)
3. Solve Each Equation: Apply the above logic to fill in the blanks for all equations.

Step-by-Step Solution:

#### First Column:
1. \( 22 + \_\_ = 30 \)
- Missing number = \( 30 - 22 = 8 \)
- Answer: \( 8 \)

2. \( 83 + \_\_ = 90 \)
- Missing number = \( 90 - 83 = 7 \)
- Answer: \( 7 \)

3. \( 49 + \_\_ = 50 \)
- Missing number = \( 50 - 49 = 1 \)
- Answer: \( 1 \)

4. \( 1 + \_\_ = 10 \)
- Missing number = \( 10 - 1 = 9 \)
- Answer: \( 9 \)

5. \( 69 + \_\_ = 70 \)
- Missing number = \( 70 - 69 = 1 \)
- Answer: \( 1 \)

6. \( 67 + \_\_ = 70 \)
- Missing number = \( 70 - 67 = 3 \)
- Answer: \( 3 \)

7. \( 13 + \_\_ = 20 \)
- Missing number = \( 20 - 13 = 7 \)
- Answer: \( 7 \)

8. \( 94 + \_\_ = 100 \)
- Missing number = \( 100 - 94 = 6 \)
- Answer: \( 6 \)

9. \( 79 + \_\_ = 80 \)
- Missing number = \( 80 - 79 = 1 \)
- Answer: \( 1 \)

10. \( 78 + \_\_ = 80 \)
- Missing number = \( 80 - 78 = 2 \)
- Answer: \( 2 \)

11. \( 58 + \_\_ = 60 \)
- Missing number = \( 60 - 58 = 2 \)
- Answer: \( 2 \)

12. \( 26 + \_\_ = 30 \)
- Missing number = \( 30 - 26 = 4 \)
- Answer: \( 4 \)

13. \( 75 + \_\_ = 80 \)
- Missing number = \( 80 - 75 = 5 \)
- Answer: \( 5 \)

14. \( 44 + \_\_ = 50 \)
- Missing number = \( 50 - 44 = 6 \)
- Answer: \( 6 \)

15. \( 6 + \_\_ = 10 \)
- Missing number = \( 10 - 6 = 4 \)
- Answer: \( 4 \)

16. \( 45 + \_\_ = 50 \)
- Missing number = \( 50 - 45 = 5 \)
- Answer: \( 5 \)

17. \( 73 + \_\_ = 80 \)
- Missing number = \( 80 - 73 = 7 \)
- Answer: \( 7 \)

18. \( 39 + \_\_ = 40 \)
- Missing number = \( 40 - 39 = 1 \)
- Answer: \( 1 \)

19. \( 11 + \_\_ = 20 \)
- Missing number = \( 20 - 11 = 9 \)
- Answer: \( 9 \)

20. \( 71 + \_\_ = 80 \)
- Missing number = \( 80 - 71 = 9 \)
- Answer: \( 9 \)

21. \( 76 + \_\_ = 80 \)
- Missing number = \( 80 - 76 = 4 \)
- Answer: \( 4 \)

22. \( 7 + \_\_ = 10 \)
- Missing number = \( 10 - 7 = 3 \)
- Answer: \( 3 \)

23. \( 19 + \_\_ = 20 \)
- Missing number = \( 20 - 19 = 1 \)
- Answer: \( 1 \)

24. \( 89 + \_\_ = 90 \)
- Missing number = \( 90 - 89 = 1 \)
- Answer: \( 1 \)

25. \( 55 + \_\_ = 60 \)
- Missing number = \( 60 - 55 = 5 \)
- Answer: \( 5 \)

#### Second Column:
1. \( 92 + \_\_ = 100 \)
- Missing number = \( 100 - 92 = 8 \)
- Answer: \( 8 \)

2. \( 24 + \_\_ = 30 \)
- Missing number = \( 30 - 24 = 6 \)
- Answer: \( 6 \)

3. \( 74 + \_\_ = 80 \)
- Missing number = \( 80 - 74 = 6 \)
- Answer: \( 6 \)

4. \( 35 + \_\_ = 40 \)
- Missing number = \( 40 - 35 = 5 \)
- Answer: \( 5 \)

5. \( 27 + \_\_ = 30 \)
- Missing number = \( 30 - 27 = 3 \)
- Answer: \( 3 \)

6. \( 99 + \_\_ = 100 \)
- Missing number = \( 100 - 99 = 1 \)
- Answer: \( 1 \)

7. \( 86 + \_\_ = 90 \)
- Missing number = \( 90 - 86 = 4 \)
- Answer: \( 4 \)

8. \( 96 + \_\_ = 100 \)
- Missing number = \( 100 - 96 = 4 \)
- Answer: \( 4 \)

9. \( 97 + \_\_ = 100 \)
- Missing number = \( 100 - 97 = 3 \)
- Answer: \( 3 \)

10. \( 16 + \_\_ = 20 \)
- Missing number = \( 20 - 16 = 4 \)
- Answer: \( 4 \)

11. \( 62 + \_\_ = 70 \)
- Missing number = \( 70 - 62 = 8 \)
- Answer: \( 8 \)

12. \( 48 + \_\_ = 50 \)
- Missing number = \( 50 - 48 = 2 \)
- Answer: \( 2 \)

13. \( 4 + \_\_ = 10 \)
- Missing number = \( 10 - 4 = 6 \)
- Answer: \( 6 \)

14. \( 54 + \_\_ = 60 \)
- Missing number = \( 60 - 54 = 6 \)
- Answer: \( 6 \)

15. \( 84 + \_\_ = 90 \)
- Missing number = \( 90 - 84 = 6 \)
- Answer: \( 6 \)

16. \( 87 + \_\_ = 90 \)
- Missing number = \( 90 - 87 = 3 \)
- Answer: \( 3 \)

17. \( 52 + \_\_ = 60 \)
- Missing number = \( 60 - 52 = 8 \)
- Answer: \( 8 \)

18. \( 72 + \_\_ = 80 \)
- Missing number = \( 80 - 72 = 8 \)
- Answer: \( 8 \)

19. \( 23 + \_\_ = 30 \)
- Missing number = \( 30 - 23 = 7 \)
- Answer: \( 7 \)

20. \( 43 + \_\_ = 50 \)
- Missing number = \( 50 - 43 = 7 \)
- Answer: \( 7 \)

21. \( 82 + \_\_ = 90 \)
- Missing number = \( 90 - 82 = 8 \)
- Answer: \( 8 \)

22. \( 3 + \_\_ = 10 \)
- Missing number = \( 10 - 3 = 7 \)
- Answer: \( 7 \)

23. \( 36 + \_\_ = 40 \)
- Missing number = \( 40 - 36 = 4 \)
- Answer: \( 4 \)

24. \( 95 + \_\_ = 100 \)
- Missing number = \( 100 - 95 = 5 \)
- Answer: \( 5 \)

25. \( 68 + \_\_ = 70 \)
- Missing number = \( 70 - 68 = 2 \)
- Answer: \( 2 \)

#### Third Column:
1. \( \_\_ + 95 = 100 \)
- Missing number = \( 100 - 95 = 5 \)
- Answer: \( 5 \)

2. \( \_\_ + 59 = 60 \)
- Missing number = \( 60 - 59 = 1 \)
- Answer: \( 1 \)

3. \( \_\_ + 11 = 20 \)
- Missing number = \( 20 - 11 = 9 \)
- Answer: \( 9 \)

4. \( \_\_ + 96 = 100 \)
- Missing number = \( 100 - 96 = 4 \)
- Answer: \( 4 \)

5. \( \_\_ + 2 = 10 \)
- Missing number = \( 10 - 2 = 8 \)
- Answer: \( 8 \)

6. \( \_\_ + 19 = 20 \)
- Missing number = \( 20 - 19 = 1 \)
- Answer: \( 1 \)

7. \( \_\_ + 58 = 60 \)
- Missing number = \( 60 - 58 = 2 \)
- Answer: \( 2 \)

8. \( \_\_ + 51 = 60 \)
- Missing number = \( 60 - 51 = 9 \)
- Answer: \( 9 \)

9. \( \_\_ + 28 = 30 \)
- Missing number = \( 30 - 28 = 2 \)
- Answer: \( 2 \)

10. \( \_\_ + 24 = 30 \)
- Missing number = \( 30 - 24 = 6 \)
- Answer: \( 6 \)

11. \( \_\_ + 64 = 70 \)
- Missing number = \( 70 - 64 = 6 \)
- Answer: \( 6 \)

12. \( \_\_ + 44 = 50 \)
- Missing number = \( 50 - 44 = 6 \)
- Answer: \( 6 \)

13. \( \_\_ + 32 = 40 \)
- Missing number = \( 40 - 32 = 8 \)
- Answer: \( 8 \)

14. \( \_\_ + 9 = 10 \)
- Missing number = \( 10 - 9 = 1 \)
- Answer: \( 1 \)

15. \( \_\_ + 77 = 80 \)
- Missing number = \( 80 - 77 = 3 \)
- Answer: \( 3 \)

16. \( \_\_ + 26 = 30 \)
- Missing number = \( 30 - 26 = 4 \)
- Answer: \( 4 \)

17. \( \_\_ + 6 = 10 \)
- Missing number = \( 10 - 6 = 4 \)
- Answer: \( 4 \)

18. \( \_\_ + 14 = 20 \)
- Missing number = \( 20 - 14 = 6 \)
- Answer: \( 6 \)

19. \( \_\_ + 78 = 80 \)
- Missing number = \( 80 - 78 = 2 \)
- Answer: \( 2 \)

20. \( \_\_ + 36 = 40 \)
- Missing number = \( 40 - 36 = 4 \)
- Answer: \( 4 \)

21. \( \_\_ + 85 = 90 \)
- Missing number = \( 90 - 85 = 5 \)
- Answer: \( 5 \)

22. \( \_\_ + 13 = 20 \)
- Missing number = \( 20 - 13 = 7 \)
- Answer: \( 7 \)

23. \( \_\_ + 35 = 40 \)
- Missing number = \( 40 - 35 = 5 \)
- Answer: \( 5 \)

24. \( \_\_ + 76 = 80 \)
- Missing number = \( 80 - 76 = 4 \)
- Answer: \( 4 \)

25. \( \_\_ + 34 = 40 \)
- Missing number = \( 40 - 34 = 6 \)
- Answer: \( 6 \)

#### Fourth Column:
1. \( \_\_ + 29 = 30 \)
- Missing number = \( 30 - 29 = 1 \)
- Answer: \( 1 \)

2. \( \_\_ + 39 = 40 \)
- Missing number = \( 40 - 39 = 1 \)
- Answer: \( 1 \)

3. \( \_\_ + 61 = 70 \)
- Missing number = \( 70 - 61 = 9 \)
- Answer: \( 9 \)

4. \( \_\_ + 94 = 100 \)
- Missing number = \( 100 - 94 = 6 \)
- Answer: \( 6 \)

5. \( \_\_ + 98 = 100 \)
- Missing number = \( 100 - 98 = 2 \)
- Answer: \( 2 \)

6. \( \_\_ + 37 = 40 \)
- Missing number = \( 40 - 37 = 3 \)
- Answer: \( 3 \)

7. \( \_\_ + 27 = 30 \)
- Missing number = \( 30 - 27 = 3 \)
- Answer: \( 3 \)

8. \( \_\_ + 74 = 80 \)
- Missing number = \( 80 - 74 = 6 \)
- Answer: \( 6 \)

9. \( \_\_ + 15 = 20 \)
- Missing number = \( 20 - 15 = 5 \)
- Answer: \( 5 \)

10. \( \_\_ + 41 = 50 \)
- Missing number = \( 50 - 41 = 9 \)
- Answer: \( 9 \)

11. \( \_\_ + 7 = 10 \)
- Missing number = \( 10 - 7 = 3 \)
- Answer: \( 3 \)

12. \( \_\_ + 42 = 50 \)
- Missing number = \( 50 - 42 = 8 \)
- Answer: \( 8 \)

13. \( \_\_ + 89 = 90 \)
- Missing number = \( 90 - 89 = 1 \)
- Answer: \( 1 \)

14. \( \_\_ + 17 = 20 \)
- Missing number = \( 20 - 17 = 3 \)
- Answer: \( 3 \)

15. \( \_\_ + 55 = 60 \)
- Missing number = \( 60 - 55 = 5 \)
- Answer: \( 5 \)

16. \( \_\_ + 72 = 80 \)
- Missing number = \( 80 - 72 = 8 \)
- Answer: \( 8 \)

17. \( \_\_ + 25 = 30 \)
- Missing number = \( 30 - 25 = 5 \)
- Answer: \( 5 \)

18. \( \_\_ + 36 = 40 \)
- Missing number = \( 40 - 36 = 4 \)
- Answer: \( 4 \)

19. \( \_\_ + 91 = 100 \)
- Missing number = \( 100 - 91 = 9 \)
- Answer: \( 9 \)

20. \( \_\_ + 84 = 90 \)
- Missing number = \( 90 - 84 = 6 \)
- Answer: \( 6 \)

21. \( \_\_ + 97 = 100 \)
- Missing number = \( 100 - 97 = 3 \)
- Answer: \( 3 \)

22. \( \_\_ + 8 = 10 \)
- Missing number = \( 10 - 8 = 2 \)
- Answer: \( 2 \)

23. \( \_\_ + 82 = 90 \)
- Missing number = \( 90 - 82 = 8 \)
- Answer: \( 8 \)

24. \( \_\_ + 9 = 10 \)
- Missing number = \( 10 - 9 = 1 \)
- Answer: \( 1 \)

25. \( \_\_ + 21 = 30 \)
- Missing number = \( 30 - 21 = 9 \)
- Answer: \( 9 \)

Final Answer:

The completed worksheet with all blanks filled in is as follows:

| First Column | Second Column | Third Column | Fourth Column |
|--------------|---------------|--------------|---------------|
| 8 | 8 | 5 | 1 |
| 7 | 6 | 1 | 1 |
| 1 | 6 | 9 | 1 |
| 9 | 5 | 4 | 9 |
| 1 | 3 | 8 | 6 |
| 3 | 1 | 1 | 2 |
| 7 | 4 | 2 | 3 |
| 6 | 4 | 9 | 3 |
| 1 | 3 | 2 | 6 |
| 2 | 4 | 6 | 5 |
| 2 | 8 | 6 | 9 |
| 4 | 2 | 6 | 3 |
| 5 | 6 | 8 | 4 |
| 6 | 6 | 1 | 8 |
| 4 | 6 | 3 | 1 |
| 5 | 3 | 4 | 3 |
| 7 | 8 | 4 | 5 |
| 1 | 8 | 6 | 8 |
| 9 | 7 | 2 | 5 |
| 9 | 7 | 4 | 9 |
| 4 | 8 | 5 | 6 |
| 3 | 7 | 7 | 8 |
| 1 | 4 | 5 | 3 |
| 1 | 5 | 4 | 2 |
| 5 | 2 | 6 | 9 |

\boxed{
\begin{array}{cccc}
8 & 8 & 5 & 1 \\
7 & 6 & 1 & 1 \\
1 & 6 & 9 & 1 \\
9 & 5 & 4 & 9 \\
1 & 3 & 8 & 6 \\
3 & 1 & 1 & 2 \\
7 & 4 & 2 & 3 \\
6 & 4 & 9 & 3 \\
1 & 3 & 2 & 6 \\
2 & 4 & 6 & 5 \\
2 & 8 & 6 & 9 \\
4 & 2 & 6 & 3 \\
5 & 6 & 8 & 4 \\
6 & 6 & 1 & 8 \\
4 & 6 & 3 & 1 \\
5 & 3 & 4 & 3 \\
7 & 8 & 4 & 5 \\
1 & 8 & 6 & 8 \\
9 & 7 & 2 & 5 \\
9 & 7 & 4 & 9 \\
4 & 8 & 5 & 6 \\
3 & 7 & 7 & 8 \\
1 & 4 & 5 & 3 \\
1 & 5 & 4 & 2 \\
5 & 2 & 6 & 9 \\
\end{array}
}