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# 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 NameTopic Description
Multiplication Table 1-10 multiplication table (from 1 to 10)
Multiplication Practice 1-10on-line practice of multiplication (from 1 to 10)
Multiplication Table 11 - 20multiplication table (from 11 to 20)
Multiplication Practice 11-20on-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