Animated lesson library
2,031 animated step-by-step lessons in 57 topics, from elementary school to college. Each card opens one lesson with captions, chapters and a transcript.
- Video lesson0:31ArithmeticElementary school2 stepsEvaluate (-3)²
Order of operations
- Video lesson0:55ArithmeticElementary school6 stepsEvaluate 5 - (4 / 12) × 1 + 3
Order of operations
- Video lesson0:32ArithmeticElementary school2 stepsEvaluate (13 - 11)² / 1 + 8
Order of operations
- Video lesson0:45ArithmeticElementary school4 stepsEvaluate 20 + 6 / 7 × 12
Order of operations
- Video lesson0:33ArithmeticElementary school3 stepsEvaluate -3²
Order of operations
- Video lesson0:35ArithmeticElementary school3 stepsEvaluate 2⁻³
Order of operations
- Video lesson0:58ArithmeticElementary school7 stepsEvaluate 6 + 12 × (4 - 9) / 7
Order of operations
- Video lesson0:34ArithmeticElementary school2 stepsEvaluate 64^(1/3) + 81^(1/4)
Order of operations
- Video lesson0:47ArithmeticElementary school5 stepsEvaluate 2/8 × 2*1 × 11
Order of operations
- Video lesson0:49ArithmeticElementary school5 stepsEvaluate 7/9/3+2
Order of operations
- Video lesson0:32ArithmeticElementary school2 stepsEvaluate 17+11-9+6
Order of operations
- Video lesson0:54ArithmeticElementary school6 stepsEvaluate 16 / 9 / 8 + 9
Order of operations
- Video lesson0:32ArithmeticElementary school2 stepsEvaluate (7 - 9)² / 4 + 14
Order of operations
- Video lesson0:32ArithmeticElementary school2 stepsEvaluate 17 × (11-1)+5
Order of operations
- Video lesson0:31ArithmeticElementary school2 stepsEvaluate 12+10 × 11
Order of operations
- Video lesson0:32ArithmeticElementary school2 stepsEvaluate 9-8+(2 × 10)
Order of operations
- Video lesson0:54ArithmeticElementary school6 stepsEvaluate 3 + 10 - (11 / 5) - 5
Order of operations
- Video lesson0:31ArithmeticElementary school2 stepsEvaluate 3.5 × 2
Order of operations
- Video lesson0:39ArithmeticElementary school4 stepsEvaluate 7/(6+2)
Order of operations
- Video lesson0:31ArithmeticElementary school2 stepsEvaluate 2³²
Order of operations
- Video lesson0:33ArithmeticElementary school3 stepsEvaluate 15 + 6 / 2 + 12
Order of operations
- Video lesson0:48ArithmeticElementary school7 stepsEvaluate 18 + (10 - 1) / 9 - 5
Order of operations
- Video lesson0:45ArithmeticElementary school4 stepsEvaluate 16 / 3 × 11 + 7
Order of operations
- Video lesson0:46ArithmeticElementary school4 stepsEvaluate 6/11 + 6/10 × 7
Order of operations
Browse by topic
- Order of operations 70
- Fractions 50
- Decimals 20
- Factors and multiples 16
- Percentages 35
- Exponents and roots 40
- Word problems 36
- Linear equations 90
- Linear functions 8
- Inequalities 90
- Absolute value equations 34
- Systems of equations 76
- Quadratic equations 90
- Polynomial equations 86
- Expanding and factoring 107
- Simplifying expressions 48
- Rational equations 30
- Radical equations 36
- Exponential equations 43
- Logarithms 60
- Sequences and series 29
- Area and perimeter 4
- Circles 16
- Triangles 23
- Pythagorean theorem 16
- Volume and surface area 14
- Coordinate geometry 14
- Trigonometric values 33
- Unit circle 12
- Trigonometric equations 52
- Trigonometric identities 14
- Limits 50
- Derivatives 85
- Indefinite integrals 62
- Definite integrals 44
- Descriptive statistics 38
- Probability 18
- Counting: permutations and combinations 9
- Normal distribution and z-scores 9
- Confidence intervals 6
- Linear regression 5
- Matrices 41
- Vectors 15
- Molar mass 40
- Moles and mass 10
- Balancing chemical equations 42
- Stoichiometry 12
- Solutions and concentration 22
- Acids, bases and pH 35
- Gas laws 16
- Newton's laws and weight 32
- Friction 8
- Work, energy and power 48
- Momentum and collisions 29
- Kinematics 22
- Projectile motion 12
- Electric circuits 29
About these lessons
Each lesson plays in your browser: the steps appear one at a time on animated boards with captions, and your device's built-in text-to-speech voice can read them aloud. They are not recorded video files, so they load fast and work on any connection.
Captions and narration are available in 16 languages. Whether a language is spoken depends on the voices installed on your device; the captions always play.
Every lesson is generated from our maths engine, and each answer was checked by an independent computer algebra system (or, for chemistry and physics, recomputed from the formula) before it was added. The check runs again whenever a lesson page is opened.
Prefer narrated videos? See the featured video lessons, or make a lesson from your own problem.