Subtract till 400

Calculate:

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

244	-	98	=
317	-	105	=
237	-	120	=
196	-	125	=
196	-	106	=
209	-	51	=
360	-	130	=
304	-	16	=
181	-	110	=
93	-	64	=