# Eighth Grade Math Skills

**How to Teach Math Lesson Plans: Eighth Grade Math Skills **

- Identifies and applies the commutative, associative, and distributive properties
- Distinguishes between numerical and algebraic expressions, equations, and inequalities
- Converts between word phrases or sentences and algebraic expressions, equations, or inequalities
- Simplifies and evaluates numerical and algebraic expressions
- Solves and checks one and two-step linear equations and inequalities
- Solves and checks multi-step linear equations using the distributive property
- Graphs solutions to inequalities on a number line
- Writes a corresponding real life situation from an algebraic expression
- Interprets and constructs frequency tables and charts
- Finds the mean, median, mode, and range of a given set of data
- Interprets and constructs bar graphs, line graphs, circle graphs, and pictographs from given data
- Interprets and constructs stem and leaf, box and whisker, and scatter plots from given data
- Predicts patterns or trends based on given data
- Uses combinations and permutations in application problems
- Calculates and applies basic probability
- Converts, performs basic operations, and solves word problems using standard measurements
- Measures line segments and finds dimensions of given figures using standard measurements
- Writes and solves real life problems involving standard measurements
- Selects appropriate units of measurement for real life problems
- Identifies parallel, perpendicular, intersecting, and skew lines
- Identifies and describes characteristics of polygons
- Finds the perimeter and area of polygons and circumference and area of circles
- Classifies, draws, and measures acute, obtuse, right, and straight angles
- Identifies and finds the missing angle measure for adjacent, vertical, complementary and supplementary angles
- Locates and identifies angles formed by parallel lines cut by a transversal (e.g., corresponding, alternate interior, and alternate exterior)
- Classifies triangles by sides and angles and finds the missing angle measure
- Identifies three-dimensional figures and describes their faces, vertices, and edges
- Uses the Pythagorean Theorem to solve problems with and without a calculator
- Identifies the
*x*and*y*-axis, the origin, and the quadrants of a coordinate plane - Plots ordered pairs
- Labels the x and y coordinates for a given point
- Uses tables and graphs simple linear equations
- Simplifies expressions using order of operations
- Uses the rules of exponents when multiplying or dividing like bases and when raising a power to a power
- Multiplies and divides numbers by powers of ten
- Converts between standard form and scientific notation
- Multiplies and divides numbers written in scientific notation
- Evaluates and estimates powers, squares, and square roots with and without calculators
- Classifies and gives examples of real numbers such as natural, whole, integers, rational, and irrational
- Identifies, compares, and orders fractions and decimals
- Rounds and estimates using fractions and decimals
- Solves real life problems involving addition, subtraction, multiplication, and division of fractions, decimals, and mixed numbers
- Determines the absolute value and additive inverse of real numbers
- Classifies, compares, and orders integers and rational numbers
- Adds, subtracts, multiplies, and divides integers and rational numbers with and without calculators
- Writes ratios comparing given data
- Converts among ratios, decimals, and percents
- Solves proportions
- Solves for part, rate, or base
- Finds commissions and rates of commission, discounts, sale prices, sales tax, and simple interest
- Finds percent of increase and decrease
- Writes and solves real life word problems using percents with and without calculators

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