
Public learning track
Rational Algebraic Expressions and Operations
8th Grade · Math · Open Global Math
8 lessons
Goal
Simplify, reduce, add, subtract, multiply, and divide rational algebraic expressions and state excluded domain values.
Featured Diagrams
Identifying Excluded Values and Domain Restrictions in Rational Expressions
8 lessons
0 of 8 done
- 1Identifying Excluded Values and Domain Restrictions in Rational ExpressionsUp nextStart
- 2Simplifying Rational Expressions by FactoringPremiumNot started yet
- 3Multiplying and Dividing Algebraic FractionsNot started yet
- 4Adding and Subtracting Rational Expressions with Like DenominatorsNot started yet
- 5Finding the Least Common Denominator of Algebraic FractionsNot started yet
- 6Adding and Subtracting Rational Expressions with Unlike DenominatorsNot started yet
- 7Simplifying Complex Algebraic FractionsNot started yet
- 8Solving Equations Involving Algebraic FractionsNot started yet
Standards Covered
- OGM.9.ALG.2Open Global Math Standards 2026™ · Math · Level 9 / Grade 8 (Age 13) · Grade 8Simplify, reduce, add, subtract, multiply, and divide rational algebraic expressions (algebraic fractions).
- OGM.9.ALG.3Open Global Math Standards 2026™ · Math · Level 9 / Grade 8 (Age 13) · Grade 8Formulate and solve one-variable linear equations (including variables on both sides, rational coefficients, and fractional equations transformable to linear) and categorize equations with one solution, infinitely many solutions, or no solution.
Curriculum Framework
8th Grade · Math · Open Global Math
1
12 lessons
Polynomial Expressions, Special Products, and Factoring
Construct, expand, factor, and evaluate polynomial expressions using algebraic identities and common factor extraction.
2
8 lessons
Rational Algebraic Expressions and Operations
Simplify, reduce, add, subtract, multiply, and divide rational algebraic expressions and state excluded domain values.
3
7 lessons
Linear Equations and Rational Linear Forms
Formulate, solve, and classify one-variable linear and fractional equations across real-world and geometric scenarios.
4
7 lessons
Linear and Compound Inequalities
Solve single-variable linear and compound inequalities algebraically and represent solution sets on number lines and in interval notation.
5
7 lessons
Systems of Linear Equations in Two and Three Variables
Solve simultaneous linear systems in two and three variables using graphical, substitution, and elimination methods, and interpret practical models.
6
13 lessons
Quadratic Equations, Discriminant Analysis, and Roots
Solve quadratic equations using factoring, completing the square, and the quadratic formula; analyze roots using the discriminant and Vieta's relations.