Adding till 400

Calculate:

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

195	+	138	=
151	+	143	=
13	+	15	=
158	+	173	=
3	+	2	=
39	+	33	=
132	+	153	=
153	+	162	=
104	+	39	=
33	+	20	=