# Multiplication - Small and Large Number Multiplication

**Multiplication** is a prescription which determine products of numbers according to definition of **multiplication**. The **multiplication** is devided into two main groups: **multiplication from 1 to 10** and **multiplication form 11 to 20**.

## Multiplication - topics

Topic Name | Topic Description |
---|---|

Multiplication Table 1-10 | multiplication table (from 1 to 10) |

Multiplication Practice 1-10 | on-line practice of multiplication (from 1 to 10) |

Multiplication Table 11 - 20 | multiplication table (from 11 to 20) |

Multiplication Practice 11-20 | on-line practice of multiplication (from 11 to 20) |

## Multiplication

The **multiplication** is an operation which is expressed by sign × (times). In computational technology, we use sign * (asterisk). It is a counting operation which determines the product by two numbers according to its definition. We work out the multiplication of two natural numbers a and b like we add the b number repeatedly the a number times.

For example:

4 × 5 = 4 + 4 + 4 + 4 + 4 = 20

The multiplication is the commutative and the associative property so we can write:

4 × 5 = 5 × 4 = 5 + 5 + 5 + 5 = 20