Subtract till 400

Calculate:

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

365	-	190	=
377	-	46	=
295	-	89	=
221	-	2	=
329	-	88	=
77	-	22	=
231	-	69	=
324	-	191	=
272	-	157	=
349	-	198	=