Rules. Addition, subtraction, multiplication and division of mixed numbers.

**To add two mixed numbers, it is necessary**:

- to reduce fraction to a least common denominator;
- add the numerators and put the answer over the same denominator;
- simplify the fraction;
- if this fraction is improper then convert fraction to a mixed number;
- add the integer portions of the two mixed numbers;
- if adding the fractional parts created a mixed number then add its integer portion to the sum.

**To subtract two mixed numbers, it is necessary:**

- to reduce fraction to a least common denominator;
- make the first numerator larger than the second if it is not;
- subtract the second numerator from the first;
- place that difference over the common denominator;
- Subtract the integer portions of the two mixed numbers;
- simplify the fraction.

**To multiply mixed numbers, it is necessary:**

- converting mixed numbers to improper fractions;
- multiply the numerators and multiply the denominators;
- simplify the fraction;
- if this fraction is improper then convert fraction to a mixed number.

**To divide mixed numbers, it is necessary:**

- converting mixed numbers to improper fractions;
- to multiply first fraction by reciprocal of second fraction;
- simplify the fraction;
- if this fraction is improper then convert fraction to a mixed number.