Adding till 400

Calculate:

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

15	+	14	=
126	+	266	=
187	+	164	=
222	+	121	=
203	+	162	=
59	+	37	=
53	+	32	=
230	+	161	=
109	+	128	=
97	+	93	=