Eighth grade math
See recommended skills!Here is a list of all of the math skills students learn in eighth grade! These skills are organized into categories, and you can move your mouse over any skill name to view a sample question. To start practicing, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!
Number theory
Integers
Operations with integers
- C.1Integer addition and subtraction rules
- C.2Add and subtract integers using counters
- C.3Add and subtract integers
- C.4Add and subtract three or more integers
- C.5Add and subtract integers: word problems
- C.6Integer multiplication and division rules
- C.7Multiply and divide integers
- C.8Evaluate expressions involving integers
Rational numbers
- D.1Write fractions in lowest terms
- D.2Least common denominator
- D.3Round decimals and mixed numbers
- D.4Convert between decimals and fractions or mixed numbers
- D.5Identify rational and irrational numbers
- D.6Absolute value of rational numbers
- D.7Compare rational numbers
- D.8Put rational numbers in order
Operations with rational numbers
- E.1Reciprocals and multiplicative inverses
- E.2Add and subtract rational numbers
- E.3Add and subtract rational numbers: word problems
- E.4Apply addition and subtraction rules
- E.5Multiply and divide rational numbers
- E.6Multiply and divide rational numbers: word problems
- E.7Apply multiplication and division rules
- E.8Apply addition, subtraction, multiplication, and division rules
- E.9Evaluate expressions involving rational numbers
Exponents and roots
- F.1Understanding exponents
- F.2Evaluate exponents
- F.3Solve equations with variable exponents
- F.4Exponents with negative bases
- F.5Exponents with decimal and fractional bases
- F.6Understanding negative exponents
- F.7Evaluate negative exponents
- F.8Multiplication with exponents
- F.9Division with exponents
- F.10Multiplication and division with exponents
- F.11Power rule
- F.12Evaluate expressions involving exponents
- F.13Identify equivalent expressions involving exponents
- F.14Square roots of perfect squares
- F.15Positive and negative square roots
- F.16Estimate positive and negative square roots
- F.17Relationship between squares and square roots
- F.18Solve equations involving squares and square roots
- F.19Cube roots of perfect cubes
- F.20Solve equations involving cubes and cube roots
- F.21Estimate cube roots
Scientific notation
Ratios, rates, and proportions
- H.1Understanding ratios
- H.2Equivalent ratios
- H.3Equivalent ratios: word problems
- H.4Unit rates
- H.5Compare ratios: word problems
- H.6Do the ratios form a proportion?
- H.7Do the ratios form a proportion: word problems
- H.8Solve proportions
- H.9Solve proportions: word problems
- H.10Estimate population size using proportions
- H.11Scale drawings: word problems
Proportional relationships
- I.1Find the constant of proportionality from a table
- I.2Identify graphs of proportional relationships
- I.3Find the constant of proportionality from a graph
- I.4Write equations for proportional relationships
- I.5Graph proportional relationships
- I.6Identify proportional relationships
- I.7Find the constant of proportionality: word problems
- I.8Solve problems involving proportional relationships
Percents
- J.1Convert between percents, fractions, and decimals
- J.2Compare percents to fractions and decimals
- J.3Find what percent one number is of another
- J.4Find what percent one number is of another: word problems
- J.5Estimate percents of numbers
- J.6Percents of numbers and money amounts
- J.7Percents of numbers: word problems
- J.8Compare percents of numbers
- J.9Solve percent equations
- J.10Percent of change
- J.11Percent of change: word problems
Consumer math
- K.1Price lists
- K.2Unit prices
- K.3Unit prices with unit conversions
- K.4Unit prices: find the total price
- K.5Percent of a number: tax, discount, and more
- K.6Find the percent: tax, discount, and more
- K.7Sale prices: find the original price
- K.8Multi-step problems with percents
- K.9Estimate tips
- K.10Simple interest
- K.11Compound interest
Units of measurement
Problem solving
Coordinate plane
Two-dimensional figures
- O.1Identify and classify polygons
- O.2Classify triangles
- O.3Classify quadrilaterals
- O.4Find missing angles in triangles and quadrilaterals
- O.5Exterior Angle Theorem
- O.6Interior angles of polygons
- O.7Identify complementary, supplementary, vertical, adjacent, and congruent angles
- O.8Find measures of complementary, supplementary, vertical, and adjacent angles
- O.9Transversal of parallel lines
- O.10Find lengths and measures of bisected lines and angles
- O.11Parts of a circle
Transformations and congruence
- P.1Symmetry
- P.2Identify reflections, rotations, and translations
- P.3Translations: graph the image
- P.4Translations: find the coordinates
- P.5Reflections: graph the image
- P.6Reflections: find the coordinates
- P.7Rotations: graph the image
- P.8Rotations: find the coordinates
- P.9Congruence statements and corresponding parts
- P.10Side lengths and angle measures of congruent figures
- P.11Congruent triangles: SSS, SAS, and ASA
Transformations and similarity
Pythagorean theorem
Three-dimensional figures
Geometric measurement
- T.1Perimeter
- T.2Area
- T.3Area and perimeter: word problems
- T.4Area between two shapes
- T.5Circles, semicircles, and quarter circles
- T.6Circles: word problems
- T.7Volume of cubes, prisms, and pyramids
- T.8Surface area of cubes, prisms, and pyramids
- T.9Volume of cylinders and cones
- T.10Surface area of cylinders and cones
- T.11Volume of spheres
- T.12Surface area of spheres
- T.13Volume and surface area of similar solids
- T.14Perimeter, area, and volume: changes in scale
Number sequences
Expressions and properties
- V.1Write variable expressions
- V.2Write variable expressions from diagrams
- V.3Write variable expressions: word problems
- V.4Evaluate one-variable expressions
- V.5Evaluate multi-variable expressions
- V.6Evaluate absolute value expressions
- V.7Evaluate radical expressions
- V.8Evaluate rational expressions
- V.9Identify terms and coefficients
- V.10Properties of addition and multiplication
- V.11Distributive property
- V.12Write equivalent expressions using properties
- V.13Add and subtract like terms
- V.14Add, subtract, and multiply linear expressions
- V.15Factors of linear expressions
- V.16Identify equivalent linear expressions
One-variable equations
- W.1Which x satisfies an equation?
- W.2Write an equation from words
- W.3Model and solve equations using algebra tiles
- W.4Write and solve equations that represent diagrams
- W.5Properties of equality
- W.6Solve one-step equations
- W.7Solve two-step equations
- W.8Solve multi-step equations
- W.9Solve equations involving like terms
- W.10Solve equations with variables on both sides
- W.11Solve equations: mixed review
- W.12Solve equations: word problems
- W.13Find the number of solutions
- W.14Create equations with no solutions or infinitely many solutions
One-variable inequalities
- X.1Solutions to inequalities
- X.2Graph inequalities on number lines
- X.3Write inequalities from number lines
- X.4Solve one-step inequalities
- X.5Graph solutions to one-step inequalities
- X.6Solve two-step inequalities
- X.7Graph solutions to two-step inequalities
- X.8Solve multi-step inequalities
- X.9Graph solutions to multi-step inequalities
Linear equations
- Y.1Find the slope of a graph
- Y.2Find the slope from two points
- Y.3Find a missing coordinate using slope
- Y.4Find the slope of an equation
- Y.5Graph a line using slope
- Y.6Graph a line from an equation
- Y.7Write a linear equation from a slope and y-intercept
- Y.8Write a linear equation from a graph
- Y.9Write a linear equation from a slope and a point
- Y.10Write a linear equation from two points
- Y.11Slopes of parallel and perpendicular lines
Functions
- Z.1Identify functions
- Z.2Does (x, y) satisfy the linear function?
- Z.3Identify independent and dependent variables
- Z.4Rate of change
- Z.5Constant rate of change
- Z.6Evaluate a linear function
- Z.7Complete a table for a linear function
- Z.8Complete a table and graph a linear function
- Z.9Interpret the graph of a linear function: word problems
- Z.10Write a linear function from a table
- Z.11Compare linear functions: graphs, tables, and equations
- Z.12Write linear functions: word problems
- Z.13Interpret linear functions
- Z.14Identify linear and nonlinear functions
- Z.15Does (x, y) satisfy the nonlinear function?
- Z.16Evaluate a nonlinear function
- Z.17Find values using function graphs
- Z.18Complete a table for a function graph
Systems of linear equations
- AA.1Is (x, y) a solution to the system of equations?
- AA.2Solve a system of equations by graphing
- AA.3Solve a system of equations by graphing: word problems
- AA.4Find the number of solutions to a system of equations by graphing
- AA.5Find the number of solutions to a system of equations
- AA.6Classify a system of equations by graphing
- AA.7Classify a system of equations
- AA.8Solve a system of equations using substitution
- AA.9Solve a system of equations using substitution: word problems
- AA.10Solve a system of equations using elimination
- AA.11Solve a system of equations using elimination: word problems
Monomials and polynomials
- BB.1Identify monomials
- BB.2Model polynomials with algebra tiles
- BB.3Add and subtract polynomials using algebra tiles
- BB.4Add and subtract polynomials
- BB.5Add polynomials to find perimeter
- BB.6Multiply monomials
- BB.7Divide monomials
- BB.8Multiply and divide monomials
- BB.9Powers of monomials
- BB.10Square and cube roots of monomials
- BB.11Multiply polynomials using algebra tiles
- BB.12Multiply polynomials
- BB.13Multiply polynomials to find area
Data and graphs
- CC.1Interpret tables
- CC.2Interpret bar graphs
- CC.3Create bar graphs
- CC.4Interpret line graphs
- CC.5Create line graphs
- CC.6Interpret line plots
- CC.7Create line plots
- CC.8Create and interpret line plots with fractions
- CC.9Interpret stem-and-leaf plots
- CC.10Interpret histograms
- CC.11Create histograms
- CC.12Create frequency charts
- CC.13Interpret box-and-whisker plots
- CC.14Scatter plots
- CC.15Interpret circle graphs
- CC.16Circle graphs and central angles
- CC.17Choose the best type of graph
Statistics
- DD.1Calculate mean, median, mode, and range
- DD.2Interpret charts to find mean, median, mode, and range
- DD.3Mean, median, mode, and range: find the missing number
- DD.4Changes in mean, median, mode, and range
- DD.5Quartiles
- DD.6Identify an outlier
- DD.7Identify an outlier and describe the effect of removing it
- DD.8Outliers in scatter plots
- DD.9Identify representative, random, and biased samples
Probability
- EE.1Probability of simple events
- EE.2Probability of opposite, mutually exclusive, and overlapping events
- EE.3Experimental probability
- EE.4Make predictions
- EE.5Compound events: find the number of outcomes
- EE.6Identify independent and dependent events
- EE.7Probability of independent and dependent events
- EE.8Factorials
- EE.9Permutations
- EE.10Counting principle
- EE.11Combination and permutation notation