Subtract till 400

Calculate:

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

305	-	59	=
308	-	111	=
243	-	156	=
354	-	78	=
153	-	67	=
154	-	153	=
194	-	83	=
216	-	7	=
261	-	76	=
207	-	134	=