Before you study you need to do two things.
1. Understand the concept of multiplication. Multiplication is an easier way of writing repeated addition.
You could write:
5 X 4 = 20 (read five times four equals twenty)
4 + 4 + 4 + 4 + 4 = 20
The first way is just a shortcut.
2. Learn seven simple rules. These rules make most of the table easy. The following pages cover each rule.