Subtract till 100

Calculate:

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

85	-	47	=
100	-	10	=
87	-	35	=
95	-	32	=
43	-	26	=
41	-	16	=
87	-	35	=
52	-	40	=
53	-	49	=
40	-	40	=