# CK-12 Middle School Math Concepts - Grade 8

**At Grade**Created by: CK-12

In CK-12 Middle School Math Concepts – Grade 8, the learning content is divided into concepts. Each concept is complete and whole providing focused learning on an indicated objective. Theme-based concepts provide students with experiences that integrate the content of each concept. Students are given opportunities to practice the skills of each concept through real-world situations, examples, guided practice and explore more practice. There are also video links provided to give students an audio/visual way of connecting with the content.

- 1.
## Using Algebra

bar graphs, histograms, frequency tables, order of operations, variable expressions, single-variable equations, perimeter, area, formula, distance, rate, time, problem-solving plan, problem-solving strategies

- 2.
## Using Rational Numbers

adding, subtracting, multiplying and dividing decimals, fractions and integers, estimation with decimals and fractions, integer operations and problem solving, problem solving with decimals, fractions and integers, identifying and comparing rational numbers, and using number properties with decimals, fractions and integers

- 3.
## Single Variable Equations and Inequalities

solving one-step, two-step and multi-step equations, combining like terms, the distributive property, solving and graphing inequalities, writing equations and inequalities to represent real-world situations, solving one-step, two-step and multi-step inequalities, problem solving

- 4.
## Applying Proportions

ratios, unit rates, equivalent rates, solving proportions, unit scale, scale factor, scale drawings, maps and floor plans, customary and metric units of measurement and problem solving

- 5.
## Applying Percents

recognizing and writing percents, percents as decimals and fractions, finding the percent of a number, proportions and percents in problem solving, using the percent equation, percent of increase, percent of decrease, percent of change, discounts, retail prices, tipping, sales tax, statistics, percent problems and scientific notation, simple interest and compound interest

- 6.
## Geometry and Transformations

This chapter covers: identifying angle pairs, adjacent and vertical angles, measures of angle pairs, classifying and measuring triangles, classifying and measuring quadrilaterals, identifying polygons, methods for proving triangle congruence, all types of transformations, similarity and dilations.