Subtract till 400

Calculate:

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

145	-	60	=
190	-	67	=
193	-	27	=
298	-	182	=
260	-	197	=
246	-	197	=
248	-	151	=
204	-	4	=
336	-	193	=
195	-	157	=