Subtract till 400

Calculate:

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

156	-	6	=
301	-	184	=
206	-	183	=
358	-	145	=
268	-	125	=
315	-	48	=
268	-	16	=
342	-	122	=
380	-	90	=
282	-	40	=