Subtract till 400

Calculate:

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

375	-	40	=
271	-	37	=
123	-	42	=
114	-	64	=
185	-	41	=
327	-	193	=
151	-	91	=
124	-	104	=
173	-	73	=
387	-	194	=