Study Guide

Greetings, Mathlings! Here's a very quick, to-the-point study guide for your assessment on Tuesday. The test will cover all fractions operations. Some quick rules to remember:

Adding fractions:

- Make sure the fractions have like denominators before you add. This can be done by finding the LCD or  by using the butterfly method. 

- Once the fractions have the same denominator, add the numerators and keep the denominator the same. Then, simplify if necessary. 

- If one of the numbers is a mixed number, add the whole numbers separately from the fractions, and then combine. 

Subtracting fractions:

- Again, make sure the fractions have like denominators before you subtract This can be done by finding the LCD or  by using the butterfly method. 

- Once the fractions have the same denominator, subtract the numerators and keep the denominator the same. Then, simplify if necessary. 

- If one of the numbers is a mixed number, subtract the whole numbers separately from the fractions, and then combine. 

Multiplying fractions:

- Multiply straight across - the numerators and the denominators. 

- You may simplify before you multiply OR after. 

- If one of the numbers is a mixed number, first convert it to an improper fraction before you multiply. 

Dividing fractions:

- Keep, flip, change:

1. Keep the first fraction the same. 

2. Flip the operation to multiplication instead of division. 

3. Change the second fraction to its reciprocal. 

- After KFC, use the method for multiplication.