Square power excercises till 20

Calculate:

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

32	+	12	=
32	+	42	=
42	+	12	=
32	+	52	=
62	+	32	=
42	+	62	=
32	+	62	=
22	+	32	=
22	+	12	=
42	+	32	=