Multiplication till 400

Calculate:

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

8	×	13	=
4	×	11	=
20	×	19	=
11	×	17	=
21	×	18	=
17	×	14	=
17	×	19	=
10	×	7	=
18	×	13	=
8	×	18	=