Signed Fraction Operations
Operations with Signed Fractions--Should be able to do these WITHOUT a calculator.
For video explanation, see
https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-fractions-topic/cc-5th-multiplying-fractions/v/multiplying-fractions-and-whole-numbers,
https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-fractions-topic/cc-5th-dividing-fractions/v/fractions-as-division, and
https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-fractions-topic/cc-5th-add-sub-fractions/v/adding-fractions--ex-1 .
For a refresher on adding and subtracting with signed numbers, see
https://www.khanacademy.org/math/arithmetic/absolute-value/adding_subtracting_negatives/v/adding-integers-with-different-signs
For a refresher on multiplying and dividing with signed number see
https://www.khanacademy.org/math/arithmetic/absolute-value/mult_div_negatives/v/multiplying-positive-and-negative-numbers