It looks like you've uploaded an image containing several arithmetic problems. I'll solve each one listed in the image.

Here are the equations from the image and their solutions:

1. 25. +8 - 4
   $8 - 4 = 4$

2. 26. -4 - 6
   $-4 - 6 = -10$

3. 27. -7 - 7 - 4
   $-7 - 7 - 4 = -18$

4. 28. +10 + 30
   $10 + 30 = 40$

5. 29. 4 + -7 + -2
   $4 - 7 - 2 = -5$

6. 30. -3 + -12 + 5
   $-3 - 12 + 5 = -10$

7. 31. -17 - 1 - 10
   $-17 - 1 - 10 = -28$

8. 32. -5 + -7 + -9
   $-5 - 7 - 9 = -21$

9. 33. +9 + -7 - 6
   $9 - 7 - 6 = -4$

10. 34. -101 + -101
    $-101 - 101 = -202$

11. 35. -75 - -25
    $-75 + 25 = -50$

12. 36. -204 + -304
    $-204 - 304 = -508$

Let me know if you'd like any further explanation for any of these steps or have additional questions.

Related Questions:

1. How do you handle adding and subtracting negative numbers?
2. Why is subtracting a negative the same as adding a positive?
3. What are common mistakes to avoid when working with negative integers?
4. How do you solve more complex arithmetic expressions with parentheses?
5. What are some strategies to simplify mental math involving negative numbers?

Tip: Always keep track of negative signs carefully when adding and subtracting numbers to avoid mistakes!