Apply and extend previous understandings of operations with fractions to add, subtract, multiply, and divide rational numbers.
The Number System
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Apply and extend previous understandings of multiplication and division and of fractions to multiply and divide rational numbers.
Solve real-world and mathematical problems involving the four operations with rational numbers. (Computations with rational numbers extend the rules for manipulating fractions to complex fractions.)
Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram.