Adding till 100

Calculate:

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

27	+	20	=
6	+	14	=
36	+	40	=
19	+	34	=
63	+	34	=
43	+	29	=
13	+	19	=
7	+	14	=
4	+	9	=
38	+	46	=