Subtract till 400

Calculate:

The number of examples:
Numerical difficulty:
Range of values:
Multiplicity:

361	-	197	=
359	-	150	=
337	-	83	=
107	-	35	=
183	-	58	=
293	-	106	=
337	-	117	=
305	-	65	=
282	-	68	=
285	-	180	=