Adding till 400

Calculate:

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

108	+	113	=
120	+	127	=
25	+	49	=
210	+	161	=
143	+	217	=
32	+	77	=
93	+	94	=
160	+	153	=
80	+	59	=
50	+	63	=