Adding till 100

Calculate:

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

2	+	5	=
51	+	35	=
9	+	10	=
53	+	46	=
14	+	17	=
21	+	23	=
7	+	7	=
46	+	33	=
17	+	12	=
10	+	14	=