Subtract till 100

Calculate:

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

88	-	49	=
26	-	13	=
76	-	34	=
70	-	47	=
74	-	12	=
73	-	31	=
64	-	23	=
64	-	43	=
100	-	14	=
11	-	7	=