Adding till 100

Calculate:

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

3	+	2	=
54	+	32	=
18	+	18	=
20	+	43	=
48	+	49	=
26	+	24	=
29	+	30	=
33	+	22	=
8	+	7	=
4	+	6	=