Adding till 400

Calculate:

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

109	+	116	=
54	+	50	=
44	+	64	=
153	+	173	=
262	+	137	=
193	+	169	=
5	+	6	=
164	+	160	=
48	+	64	=
96	+	37	=