Adding till 400

Calculate:

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

115	+	114	=
182	+	186	=
83	+	47	=
90	+	56	=
156	+	102	=
52	+	51	=
219	+	142	=
12	+	13	=
195	+	93	=
142	+	194	=