# Number - Multiplication (Product)

> (Data|State) Management and Processing > (Data Type|Data Structure) > Number, Numeric, Quantity > Number - Function > Number - Arithmetic (Function|Operation)

### Table of Contents

## 1 - About

Multiplication is denoted by:

- the cross symbol
`×`

(\times in Latex), - by a point
`·`

- or by the absence of symbol

## 2 - Articles Related

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## 3 - Properties

Multiplication is:

- Associative: <math>\alpha(\beta.v) = (\alpha.\beta)v</math>

## 4 - Rules for handling the signed quantities

By: Rafael Bombelli in his Algebra (1572)

- Plus times plus makes plus
- Minus times minus makes plus
- Plus times minus makes minus
- Minus times plus makes minus.