Adding till 100

Calculate:

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

35	+	31	=
21	+	36	=
35	+	58	=
21	+	13	=
1	+	2	=
10	+	16	=
4	+	7	=
37	+	45	=
40	+	52	=
59	+	27	=