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### Course: Arithmetic (all content) > Unit 4

Lesson 8: Multiplying & dividing negative numbers- Multiplying positive & negative numbers
- Multiplying numbers with different signs
- Why a negative times a negative makes sense
- Signs of expressions
- Dividing positive and negative numbers
- Multiplying and dividing negative numbers
- Multiplying negative numbers
- Why a negative times a negative is a positive
- Simplifying complex fractions
- Simplify complex fractions
- Multiplying negative numbers review
- Dividing negative numbers review

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# Simplify complex fractions

## Problem

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