Students will learn how to determine whether two expressions are equivalent, where each expression is a fraction with or without negative signs. For example, \(5/b\) is equal to \(-5/-b,\) but is not equal to \(5/-b.\) Here's a lesson. Students can practice here and here.
Next, give your students this challenge:
Highest and Lowest by NRICH
Conclude by leading this investigation:
A little bit of Aggression (addition, subtraction)