Adding till 100

Calculate:

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

5	+	4	=
1	+	4	=
4	+	2	=
3	+	4	=
16	+	9	=
16	+	19	=
55	+	44	=
25	+	29	=
24	+	11	=
3	+	3	=