It would probably be best to go and see your teacher for extra help.
2. An easy way to subtract fractions is to turn them into improper fractions (whole number multiplied by denominator. then plus numerator)
3. To add fractions, find the least common denominator, change the fractions and then add.
11. A reciprocal is when you flip the number, so ex. 3/4's reciprocal would be 4/3 or 1 1/3. the reciprocal of 3 (3/1) would be 1/3.