Subtract till 400

Calculate:

Number of examples:
Numerical difficulty:
Range of values:
Multiplicity:

204	-	46	=
331	-	49	=
78	-	31	=
87	-	82	=
349	-	51	=
215	-	160	=
328	-	199	=
323	-	65	=
126	-	38	=
161	-	151	=