Subtract till 100

Calculate:

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

24	-	19	=
96	-	47	=
41	-	31	=
87	-	37	=
57	-	11	=
73	-	38	=
47	-	27	=
35	-	2	=
87	-	43	=
55	-	27	=