Khan Academy
Khan Academy: Simplify Hairy Fractions
Practice simplifying complex fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Calculator Soup
Calculator Soup: Fractions Average Calculator
This calculator finds the average of a set of fractions by adding all of the fractions and dividing by the number of fractions in the set. Enter positive or negative fractions, integers and mixed numbers and the calculator converts...
Khan Academy
Khan Academy: Multiplying Negative Numbers Review
Summarizes the rules for multiplying with negative numbers, along with examples, and presents three practice questions.