Adding till 400

Calculate:

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

32	+	31	=
205	+	176	=
218	+	105	=
223	+	157	=
157	+	160	=
118	+	118	=
96	+	153	=
36	+	43	=
3	+	4	=
186	+	187	=