Subtract till 400

Calculate:

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

110	-	85	=
383	-	187	=
385	-	21	=
173	-	149	=
227	-	161	=
328	-	66	=
223	-	184	=
273	-	193	=
353	-	173	=
282	-	144	=