**Expression** | An algebraic expression is a mathematical phrase that can contain ordinary numbers, variables (like x or y) and operators (like add, subtract, multiply, and divide). ... In the above expression the "/" means divide. The "3x" means multiply the variable x |

**Substitution** | To change one thing for another. You might be asked to substitute a number into an expression. For example , what is the value of 4p3 when p = 2? We know that 4p3 means 4 × p × p × p, so when p = 2 we substitute this into the expression: 4 × 2 × 2 × 2 (or |

**Simplify** | To make simpler. One of the big jobs we do in Algebra is simplification. You will often be asked to put something "in simplest form". |

**Formula** | A formula is a special type of equation that shows the relationship between different variables. A variable is a symbol like x or V that stands in for a number we don't know yet. |

**Financial** | Connected to money matters. |

**Arithmetic** | Arithmetic or arithmetics (from the Greek ἀριθμός arithmos, "number") is the oldest and most elementary branch of mathematics. It consists of the study of numbers, especially the properties of the traditional operations between them—addition, subtraction, |

**Negative number** | A number lower than zero e.g. -1, -2 |

**Multiply** | Multiplication (often denoted by the cross symbol "×", by a point " · ", by the absence of symbol, or, on computers, by an asterisk "∗") is one of the four elementary, mathematical operations of arithmetic; with the others being addition, subtraction and |

**Perimeter** | The perimeter is the length of the outline of a shape. To find the perimeter of a rectangle or square you have to add the lengths of all the four sides. x is in this case the length of the rectangle while y is the width of the rectangle. |

**Area** | The area of a shape is a measure of the 2 dimensional space that it covers. Area is measured in squares - e.g. square cm, square metres and square km. |

**Compound shape** | In maths, a compound shape consists of two or more simple shapes, such as triangles, squares, circles and rectangles. Another name for a compound shape is a composite shape. An example of this concept is a triangle placed on top of a square. |

**2D** | '2D' stands for 2-dimensional. A 2D shape is any shape that has two dimensions. Think about what it means to have two dimensions for a moment. If we had only one dimension to work with, we could only move backwards or forwards in a line. A line is one-dim |

**Volume** | The amount of space that a substance or object occupies, or that is enclosed within a container. |

**Cuboid** | a solid which has six rectangular faces at right angles to each other.2.ANATOMY |