To add fractions you need to find a common denominator. You do this by listing the multiples of the two fractions. The least common multiple is what you use . Change the denominator to the least common multiple , then just add the numerators across, but keep the common denominator the same. Then simplify your answer.
To subtract fractions you have to have to find a common denominator. You do this by finding the least common multiple of the denominator of each fraction. Then use the least common multiple Then you have to do what you did to the denominator to the numerator.
Then you subtract the numerators across, then simplify your answer.
To multiply fractions you have to just multiply across just like you are doing normal multiplication facts, and you should simplify if you get an improper fraction.
To divide fractions you have to keep, change, flip. Keep means you have to keep the first fraction in the equation the same. Change means to change the division sign to a multiplication sign and then flip the second fraction around. Then just multiply across and simplify your answer.