BODMAS is a very useful method that helps you to solve mathematical problems. It is important rule to follow because if you want follow it your answer will always be wrong. The rule that tells you how to solve a problem in a specific order to obtain more quick, accurate and right answer is known as " order of operation " and without applying them properly you won't get your correct answer.
This is the full form and complete meaning of BODMAS.
B - brackets (whenever you solve a problem you need to first solve the part that is into a bracket).
O - order (then we solve the number that have powers or are in roots) .
D - division
M - multiplication
A - addition
S - subtraction