GED Math Prep

Learn how to calculate percentages step by step — find percent of a number, percent change, and convert between fractions, decimals, and percentages.

Learn how decimal place value works, read and write decimals, and understand how decimals relate to fractions.

Apply PEMDAS to expressions involving fractions — grouping symbols, exponents, multiplication, division, addition, and subtraction with fractional values.

Learn how to add fractions with like and unlike denominators, step by step with worked examples.

Learn how to subtract fractions with like and unlike denominators, including borrowing with mixed numbers.

Learn how to multiply fractions and mixed numbers with step-by-step examples and simplification.

Learn how to divide fractions using the reciprocal method, with worked examples and real-world applications.

Learn how to work with ratios, set up and solve proportions, and apply them to real-world scaling problems.

Learn how to solve linear equations step by step using inverse operations, with worked examples and practice problems.

Learn how to calculate the slope of a line from two points using the slope formula, with worked examples.

Learn how to graph linear equations using slope-intercept form, point-slope form, and intercepts.

Learn how to solve systems of two linear equations using substitution and elimination methods.

Learn how to solve and graph linear inequalities, including compound inequalities and absolute value.

Learn about acute, right, obtuse, straight, and reflex angles plus complementary and supplementary angle pairs.

Learn how to calculate the perimeter of rectangles, triangles, and other polygons, plus circumference of circles.

Learn how to calculate the area of rectangles, triangles, parallelograms, and trapezoids with step-by-step examples.

Learn the circle area formula A = πr², how to work with diameter vs radius, and sector area calculations.

Learn how to calculate the volume of rectangular prisms, triangular prisms, cylinders, cones, pyramids, spheres, and hemispheres.

Learn the Pythagorean theorem a² + b² = c², how to find unknown sides, and common Pythagorean triples.

Learn how to calculate the surface area of prisms, cylinders, spheres, cones, and pyramids for painting, wrapping, and material estimation.

Learn how to identify similar triangles, set up proportions, and use them for indirect measurement and scaling.

Understand what statistics is, the difference between populations and samples, and how descriptive and inferential statistics work.

Learn the difference between categorical and quantitative data, discrete and continuous variables, and the four levels of measurement.

Learn the three measures of central tendency — mean, median, and mode — and when to use each one.

Learn how to read and interpret bar charts, line graphs, pie charts, and histograms for data analysis and test prep.

Learn how to measure the spread of data using range and standard deviation, with step-by-step calculations.

Learn how to organize raw data into frequency tables and represent distributions with histograms.

Learn how to draw conclusions from data tables, identify trends, and make evidence-based decisions from datasets.

Learn how to describe the shape, center, and spread of a distribution and identify the effects of outliers.

Learn the fundamentals of probability — calculating likelihood of events, complement rule, and combined events.

Learn the five main sampling methods — simple random, stratified, cluster, systematic, and convenience — and when to use each.

Learn to identify selection bias, response bias, nonresponse bias, and other common sources of error in statistical studies.

Learn how to calculate weighted averages when values have different levels of importance or frequency.

Learn how percentiles, quartiles, and the five-number summary describe where values fall within a dataset.

Learn how to calculate and interpret z-scores to compare values across different datasets and distributions.