Adding till 400

Calculate:

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

132	+	167	=
222	+	141	=
18	+	24	=
60	+	116	=
112	+	141	=
23	+	21	=
68	+	65	=
127	+	196	=
108	+	85	=
181	+	206	=