Subtract till 400

Calculate:

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

283	-	178	=
224	-	98	=
321	-	190	=
372	-	37	=
360	-	30	=
179	-	6	=
239	-	85	=
191	-	174	=
294	-	11	=
88	-	32	=