Square power excercises till 400

Calculate:

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

82	+	22	=
32	+	12	=
12	+	22	=
102	+	72	=
62	+	92	=
52	+	142	=
72	+	72	=
102	+	102	=
92	+	102	=
22	+	12	=