## Glossary of Algebra I Lessons 9, 10

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- The ___________ property of multiplication states that changing the order of the factors does not change the product.
- commutative

- (-)(-)=__
- +

- If a fraction simplifies to a nonzero number divided by zero, the answer is _________.
- undefined

- Addition and __________ are inverse operations.
- subtraction

- If a fraction simplifies to zero divided by zero, the answer is _______________
- indeterminate

- (-)/(-)=__
- +

- When converting measurements of area, we use _____ unit multipliers.
- two

- (-)/(+)=__
- -

- If the bottom of a fraction is not zero and the top of the fraction is zero, the fraction equals _____.
- zero

- In multiplication and division of two signed numbers, unlike signs yield a __________ answer.
- negative

- If one operation will undo another operation, the two operations are called _________operations.
- inverse

- (+)/(+)=
- +

- (+)(+)=__

- +

- In multiplication and division of two signed numbers, like signs yield a ________ answer.
- positive

- (+)/(-)=__
- -

- (+)(-)=__
- -

- Multiplication and _________ are inverse operations.
- division

- (-)(+)=
- -