Ok how you answer this is called a Calculator.... but anyway
Start with the bigger numbers and work your way down
9876
+ 110
----------
9986
+ 100
----------
10,086
+ 87
----------
10,174
+ 64
-----------
10,248
+ 30
-----------
10,278
+ 3
-----------
10,281
+ 2
-----------
10,283
10,283 is your answer