The seventh problem is: -60 - 53 = 7

Solution:

This is a subtraction problem. We are subtracting 53 from 60. In the ones place, 0 - 3 requires borrowing. So, we borrow 1 from the tens place (6 becomes 5) and add 10 to the ones place (0 becomes 10). Then, 10 - 3 = 7. In the tens place, 5 - 5 = 0. Combining these gives us 7.

 60
-53
--- 
  7

Answer: 7