Adding till 400

Calculate:

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

125	+	168	=
139	+	128	=
39	+	48	=
68	+	80	=
192	+	196	=
129	+	219	=
133	+	99	=
124	+	134	=
112	+	85	=
95	+	95	=