Question

how to understand MATHS of class 11th easily ..

Answer 1

by practicing every sum properly

Answer 2

It's pretty easy, first of all don't think that it is difficult, it will have a negative impact on you psychology. Next up always pay attention in class, and if you don't understand something, don't be ashamed to ask even the slightest of doubts in the class in front of all the students. And third, the most important, always, ALWAYS do self study. It is the only way to make it easy.