Subtract till 400

Calculate:

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

278	-	107	=
254	-	10	=
154	-	123	=
295	-	105	=
361	-	161	=
308	-	176	=
279	-	171	=
182	-	20	=
95	-	76	=
71	-	32	=