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Learn about the first natural number, its properties, and its uses in mathematics, computer science, and other fields. See how 1 is written and pronounced in different languages and numeral systems.
- one
- 1st, (first)
- 1
- unary
- Algebra foundations. Overview and history of algebra: Algebra foundations Introduction to variables: Algebra foundations Substitution and evaluating expressions: Algebra foundations.
- Solving equations & inequalities. Linear equations with variables on both sides: Solving equations & inequalities Linear equations with parentheses: Solving equations & inequalities Analyzing the number of solutions to linear equations: Solving equations & inequalities.
- Working with units. Rate conversion: Working with units Appropriate units: Working with units Word problems with multiple units: Working with units.
- Linear equations & graphs. Two-variable linear equations intro: Linear equations & graphs Slope: Linear equations & graphs Horizontal & vertical lines: Linear equations & graphs.
Learn about the number 1, its history, properties, and uses in mathematics, science, religion, and culture. Find out how 1 is the fundamental unit of counting, the multiplicative identity, and the first figurate number of many kinds.
Let's explore various ways to represent the number 1 as a fraction, like 1/1, 2/2, and 3/3. We see how dividing a whole into equal parts and shading them in can represent 1 whole. We also use a number line to visualize these fractions, emphasizing that they all represent the same value: 1 whole.
- 4 min
- Sal Khan
Learn the meaning and usage of the word one as an adjective, noun, pronoun, and suffix. Find out the origin, etymology, and related phrases of one in the online dictionary.