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Louisiana Standards

Louisiana 8th Grade Math Standards

All 28 Louisiana math standards for 8th grade, each explained in plain English. The official wording is in Louisiana Department of Education's document, linked at the end of this page.

28 standards

The Number System

2 standards
8.NS.A.1
Know that non-rational numbers are irrational, see that every number has a decimal form, show rational decimals repeat, and convert repeating decimals to fractions.
8.NS.A.2
Use rational approximations to compare irrational numbers, place them on a number line, and estimate expressions like π², such as showing √2 is between 1.4 and 1.5.

Expressions and Equations

8 standards
8.EE.A.1
Use the exponent rules, like 2³ × 2² = 2⁵ or 3⁻² = 1/9, to rewrite expressions with whole-number and negative exponents.
Common Core 8.EE.1
8.EE.A.2
Solve equations like x² = 25 or x³ = 8 with square and cube roots, find the roots of small perfect squares and cubes, and know that the square root of 2 is irrational.
Common Core 8.EE.2
8.EE.A.3
Estimate very large or very small quantities with a single digit times a power of 10, like 3 x 10⁸, and tell how many times bigger one is than another.
8.EE.A.4
Add, subtract, multiply and divide numbers in scientific notation, mix them with ordinary decimals, and pick sensible units for very large or very small measurements.
Common Core 8.EE.4
8.EE.B.5
Graph a proportional relationship, read its unit rate as the slope, and compare two such relationships shown in different ways, like a graph against an equation.
Common Core 8.EE.5
8.EE.B.6
Explain with similar triangles why a line's slope is the same between any two of its points, and derive the equations y = mx and y = mx + b.
Common Core 8.EE.6
8.EE.C.7
Solve one-variable linear equations with fractions, parentheses and like terms, and tell whether an equation has one solution, none or infinitely many.
Common Core 8.EE.7
8.EE.C.8
Solve a pair of linear equations in two variables by graphing or algebra, knowing the solution is where the two lines cross, and use such pairs to solve word problems.
Common Core 8.EE.8

Functions

5 standards
8.F.A.1
Explain that a function gives exactly one output for each input and that its graph is the set of input and output pairs, without needing function notation.
8.F.A.2
Compare two functions given in different ways, like one as a table and one as an equation, to see which has the greater rate of change.
Common Core 8.F.2
8.F.A.3
Recognize y = mx + b as a linear function with a straight-line graph, and sort functions as linear or nonlinear from equations, graphs or tables, like A = s² is not linear.
8.F.B.4
Write a linear function for a real situation, find its rate of change and starting value from a description, table, graph or two points, and explain what they mean.
Common Core 8.F.4
8.F.B.5
Describe what a graph shows about two quantities, like where it rises, falls or curves, and sketch a graph from a verbal description.
Common Core 8.F.5

Geometry

9 standards
8.G.A.1
Check with tracing paper or software that sliding, turning or flipping a figure keeps its side lengths, angles and parallel lines unchanged.
Common Core 8.G.1
8.G.A.2
Explain congruence as a series of rotations about the origin, reflections over the x- or y-axis and translations taking one figure onto another, and describe such a series.
8.G.A.3
Use coordinates to describe how dilations from the origin, translations, rotations about the origin and reflections over the x- or y-axis move flat figures.
8.G.A.4
Explain similarity as rotations, reflections, translations and dilations that map one figure onto another, and describe that series, using the origin as center and the axes as mirrors.
8.G.A.5
Argue informally why a triangle's angles add to 180 degrees, which angles match when a line crosses parallel lines, and why two equal angles make triangles similar.
Common Core 8.G.5
8.G.B.6
Use the areas of squares drawn on a right triangle's sides to explain why the Pythagorean Theorem and its converse are true.
8.G.B.7
Use the Pythagorean theorem to find a missing side of a right triangle in real problems, flat or in three dimensions, like the diagonal of a box.
Common Core 8.G.7
8.G.B.8
Find the distance between two points on a coordinate grid by treating it as the long side of a right triangle.
Common Core 8.G.8
8.G.C.9
Use the volume formulas for cylinders, cones and spheres to solve real problems, like how much a can or an ice cream cone holds.
Common Core 8.G.9

Statistics and Probability

4 standards
8.SP.A.1
Make a scatter plot of two measurements, like height and shoe size, and describe clusters, outliers and whether the points trend up, down, in a line or in a curve.
Common Core 8.SP.1
8.SP.A.2
Draw a straight line of best fit by eye through a scatter plot that looks linear, and judge how well it fits by how close the points sit to it.
Common Core 8.SP.2
8.SP.A.3
Use the equation of a fitted line to solve problems, explaining what its slope and intercept mean, like 1.5 cm of growth per extra hour of sunlight.
Common Core 8.SP.3
8.SP.A.4
Organize yes-or-no data about two things, like curfews and chores, in a two-way table and use row or column percentages to see whether the two are linked.
Common Core 8.SP.4

The official Louisiana documents

The plain-English lines on this page are EMStudio's own explanations of Louisiana's standards, not the official wording, which Louisiana Department of Education publishes in the documents above. Codes and strand names identify each standard.