Adding till 100

Calculate:

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

19	+	32	=
32	+	43	=
34	+	20	=
52	+	42	=
22	+	17	=
21	+	26	=
30	+	30	=
25	+	58	=
40	+	56	=
44	+	37	=