Subtract till 400

Calculate:

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

286	-	67	=
331	-	181	=
100	-	14	=
261	-	187	=
193	-	8	=
92	-	3	=
151	-	18	=
77	-	76	=
162	-	60	=
357	-	156	=