Multiplication till 400

Calculate:

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

8	×	7	=
20	×	16	=
20	×	17	=
19	×	11	=
16	×	15	=
13	×	9	=
9	×	12	=
16	×	17	=
5	×	8	=
13	×	11	=