Math

Algebra

Introduction to algebra

Overview and history of algebra

Linear equations

Converting repeating decimals to fractions

Ratios and proportions

Systems of equations and inequalities

Solving systems with elimination (addition-elimination)

Solving systems with substitution

Super fast systems of equations

Thinking about solutions to systems

Arithmetic

Arithmetic and pre-algebra

Addition and subtraction

Intro to addition and subtraction

Fractions

Adding and subtracting fractions with unlike denominators

Adding and subtracting mixed number with unlike denominators

Mixed number addition and subtraction

Mixed number multiplication and division

Calculus

Indefinite and definite integrals

Indefinite integral as anti-derivative

Riemann sums and definite integration

U-substitution

Early math

Counting

Counting small numbers

Geometry

Points, lines, and planes

Introduction to Euclidean geometry

Probability and statistics

Independent and dependent events

Basic probability

Dependent probability

Partner Content

MIT+K12

Physics

Oldest

Adding mixed numbers with regrouping

Khan Academy
608
05:07
Subtracting mixed numbers with regrouping (unlike denominators)

Khan Academy
467
03:50
Adding mixed numbers: 19 3/18 + 18 2/3

Khan Academy
578
02:20
Subtracting mixed numbers: 7 6/9 - 3 2/5

Khan Academy
566
02:30