Adding till 100

Calculate:

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

29	+	46	=
11	+	9	=
10	+	9	=
33	+	26	=
25	+	31	=
16	+	15	=
48	+	33	=
9	+	16	=
45	+	47	=
41	+	24	=