Without hard work, we cannot get anything in this world.
ALLAH created us for the work. He has given us the powers of seeing, listening, smelling, touching & wisdom.
When we work we use all of them.
For math learn tables. Concentrate on basic things once you learn then you will get good marks.
PRAY 5 times & read QURAN daily with translation.
Read SURA FULK & SURA WANAAS before you go to the bed.