i use to do lots of silly mistakes and often forget steps to a known maths also.pl help how to build up foundation in maths as i am very much interested to study science in XI

First remedy is increase your concentration while doing the questions. Please immediately recheck the questions after you do a question

Again practice is best way to improve and building up foundation for maths

Please read some articles on the given link
http://blog.askiitians.com/