Fraction Operations
Operations with 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 .