Subtract till 100

Calculate:

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

94	-	14	=
27	-	15	=
55	-	40	=
78	-	42	=
37	-	32	=
100	-	26	=
92	-	15	=
69	-	14	=
46	-	10	=
51	-	16	=