It seems you have uploaded an image with some subtraction and addition problems. I'll go ahead and solve them step by step:

Subtraction:

1. 586 - 192 = 394
2. 434 - 162 = 272
3. 875 - 381 = 494
4. 949 - 275 = 674

Addition:

1. 4 + 2 = 6
2. 82 + 21 = 103
3. 92 + 26 = 118
4. 63 + 10 = 73

Let me know if you'd like a more detailed explanation or further assistance with other problems!

Here are some related questions to explore further:

1. How do you handle borrowing in subtraction with larger numbers?
2. What is the commutative property of addition?
3. Can subtraction be done in any order like addition?
4. What strategies can you use to check the accuracy of your calculations?
5. How do you perform multi-digit addition or subtraction efficiently?

Tip: To double-check subtraction, you can add the result back to the subtracted number to see if it equals the original value.