Adding till 100

Calculate:

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

12	+	15	=
41	+	41	=
16	+	11	=
38	+	49	=
29	+	30	=
31	+	16	=
32	+	28	=
15	+	31	=
50	+	43	=
43	+	33	=