Maths is nothing but the subject of Numbers which include +, -, *, /, and some formulaes associated to various aspects.But what ever we do we basically use numbers. So for learning from basics dont try to byhard tables from 1 to 20 in this way:
2*1=2
2*2=4
2*3=6
for an alternative and easy way so that we can easily learn fast with spending less energy. the easiest way is:
2 4 6 8 10 12 14 16 18 20
for 3rd series:
3 6 9 12 15 18 21 24 27 30
as we recognize phone number we need to read tables as series from 1-20.