Numbers & Operations

Numbers & Operations

  • Integer: Whole numbers and their negatives (e.g., -3, 0, 7).

  • Rational Number: A number that can be expressed as a fraction (e.g., ½, -4, 0.75).

  • Irrational Number: A number that cannot be written as a fraction (e.g., √2, π).

  • Prime Number: A number greater than 1 with only two factors: 1 and itself (e.g., 2, 3, 5).

  • Composite Number: A number with more than two factors (e.g., 4, 6, 9).

  • Factor: A number that divides another number evenly.

  • Multiple: The result of multiplying a number by an integer.

➕ Algebra

  • Variable: A symbol (usually a letter) that represents an unknown value.

  • Expression: A combination of numbers, variables, and operations (e.g., 3x + 2).

  • Equation: A statement that two expressions are equal (e.g., 2x = 10).

  • Inequality: A statement comparing two expressions using <, >, ≤, or ≥.

  • Coefficient: The number multiplied by a variable (e.g., in 5x, 5 is the coefficient).

  • Term: A single part of an expression or equation (e.g., 4x or -7).

  • Constant: A value that does not change (e.g., in 3x + 5, the 5 is constant).

📐 Geometry

  • Point: An exact location in space.

  • Line: A straight path that extends infinitely in both directions.

  • Angle: Formed by two rays with a common endpoint.

  • Right Angle: An angle of exactly 90°.

  • Acute Angle: An angle less than 90°.

  • Obtuse Angle: An angle greater than 90° but less than 180°.

  • Perimeter: The distance around a shape.

  • Area: The amount of space inside a shape.

  • Volume: The amount of space a 3D object occupies.

📊 Statistics & Probability

  • Mean: The average of a set of numbers.

  • Median: The middle value when numbers are ordered.

  • Mode: The number that appears most often.

  • Range: The difference between the highest and lowest values.

  • Probability: The likelihood of an event occurring (from 0 to 1).