Curated OER
Excluded Values
In this simplification of radicals activity, students solve 26 problems to find the values of the variable that should be excluded from answers because they will make the denominator equal zero.
Curated OER
Math Mammoth End of Year Test - Grade 2
Assess your second graders with this end of the year test. Originally meant for home school, this assessment could also be used in a larger setting. Learners complete 35 problems based on their knowledge of the second grade math...
Curated OER
Solving Absolute Value Inequalities
Start this activity with a brief description of how to solve absolute value inequalities. A space is provided to help classify the inequalities into types (greater than, less than, or equal to) and for learners to show how to graph their...
Flipped Math
Rational Equations
Take a rational look at solving equations. Learners watch a video presentation on solving simple rational equations that shows solving the equation along with finding excluded values. Viewers then practice the skill with the worksheets...
EngageNY
Equations Involving a Variable Expression in the Denominator
0/0 doesn't equal 0! Begin this lesson by allowing the class to explore the concept of dividing by zero. The introduction allows for discovery and provides meaningful examples of dividing by zero. This understanding leads to solving...
Curated OER
Rational Expressions
For this algebra worksheet, students solve expressions containing fractions. They solve using cancellations and factoring. There are 26 problems with an answer key.
Curated OER
How Simple Is Your Rational Expression?
Investigate simplifying rational expressions. Learners define rational expressions, review how numerators and denominators are polynomials and complete several problems using a checklist to ensure they don't skip any steps. Work can be...
Illustrative Mathematics
Watch out for Parentheses
It is important for the algebra learner to understand the use of parentheses. Mathematicians of all levels can make errors with nested parentheses. This will give them some practice. It makes for a good class starter or quick assessment.
Curated OER
Info. From a Graph
In this graphing instructional activity, high schoolers answer 13 questions about 3 graphs. Students determine the degree, roots, y-intercepts, inflection points, multiplicity, etc. of three different graphs.
Curated OER
Quadratic Functions
In this algebra activity, students graph quadratic functions and identify the vertex, axis of symmetry, maximum and minimum and intercepts. There are 7 questions.
Curated OER
Partial Quotients
Fifth graders examine the partial-quotients algorithm for finding the answer to a division problem. In this partial quotients lesson, 5th graders demonstrate the process of division through a series of estimations....
Pennsylvania Department of Education
Using Multiplication to Solve Word Problems
Fourth graders solve word problems using multiplication. In this multiplication instructional activity, 4th graders write and solve word problems using their prior knowledge of multiplication.
Pennsylvania Department of Education
Comparing Sets
Students count back with cubes to model subtraction problems. In this subtraction lesson plan, students compare sets of problems and record their results in a table.
CK-12 Foundation
Ck 12: Algebra: Excluded Values for Rational Expressions
[Free Registration/Login may be required to access all resource tools.] Reduce rational expressions involving fractions to simplest terms and find their excluded values.
CK-12 Foundation
Ck 12: Algebra: Excluded Values for Rational Expressions
[Free Registration/Login may be required to access all resource tools.] Learn how to simplify rational expressions and find excluded values.
CK-12 Foundation
Ck 12: Algebra: Excluded Values for Rational Expressions
[Free Registration/Login may be required to access all resource tools.] Learn how to simplify rational expressions and find excluded values.
Paul Dawkins
Paul's Online Notes: Math Notes: Excluded Values in Rational Functions
A description and example of which values are excluded from the domain of a rational function.
Help Algebra
Help algebra.com: Rational Expressions
In addition to defining rational expressions, this resource demonstrates how to find the excluded values and zeros of the expressions.
Math Planet
Math Planet: Simplify Rational Expression
An algebraic expression where both the numerator and the denominator are polynomials e.g.(x+3) / x is called a rational expression. Since the denominator can't be zero there are values of x which are excluded from the rational...
CK-12 Foundation
Ck 12: Algebra: Solving Rational Equations Study Guide
This comprehensive study guide highlights the main terms and formulas needed to review solving rational equations. Examples are included.