Adding till 100

Calculate:

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

17	+	20	=
47	+	41	=
8	+	10	=
41	+	44	=
34	+	25	=
24	+	13	=
35	+	48	=
11	+	7	=
18	+	30	=
11	+	12	=