Free interactive math practice from Grade 1 to Calculus

Math Galaxy is a free math practice game by Mathify Kids. Pick a planet for your grade level, choose a mission, and answer 10 auto-generated questions with instant feedback and step-by-step explanations. The difficulty adapts as you play, and you earn stars for every mission you master. No sign-up, no ads inside the game — just practice.

Elementary (Grades 1–5): addition and subtraction, multiplication and division facts, place value, telling time and elapsed time, counting money, rounding, perimeter, fractions and mixed numbers, decimals, measurement conversions, and word problems.

Middle school (Grades 6–8): percentages, ratios and proportions, unit rates, integers, absolute value, one- and two-step equations, like terms, prime factorization, slope, the Pythagorean theorem, scientific notation, probability, and statistics.

High school: Algebra I (factoring, quadratics, systems), Geometry (angles, area, surface area, volume), Algebra II (logarithms, complex numbers, sequences), Trigonometry, and an introduction to Calculus (limits, derivatives, integrals).

Want printable practice too? Try our Math Exam Generator for ready-to-print tests with answer keys, or browse our free math worksheets.

Frequently asked questions

Is Math Galaxy really free?

Yes — every planet, mission, and question is free, with no account required.

What grades does it cover?

Grade 1 through Grade 8, plus Algebra I, Geometry, Algebra II, Trig/Precalc, and Calculus — 114 skills in total.

Does it work on phones and tablets?

Yes. It is built for touch, with a big built-in number pad, and works in any modern browser.

How does the difficulty adapt?

Each skill has three difficulty tiers. Three correct answers in a row move you up a tier; two misses move you down, so questions stay at the right challenge level.