# Lesson MOVIE (FLASH) Integers

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### Source code of 'MOVIE (FLASH) Integers'

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 This video lesson introduces the set of integer numbers as the set of natural numbers and opposite to them negative numbers. It is illustrated by the number line. Then the teacher explains how to add and subtract integer numbers taking into account their signs. Sign rules are explained for multiplication and division of integers with identical and opposite signs also. All these rules are illustrated by numerous examples.