standard_description: Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.
problem_activity: Stage 6: Add and Subtract Fractions
Required Preparation
Materials to Copy
Blackline Masters
Compare Stage 6 Cards
Compare Stage 3-8 Directions

Narrative
Students use cards with expressions with addition and subtraction of fractions with the same denominator.


aligns: no