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Multiplicative Identity
The multiplicative identity is the number . Multiplying any number by leaves its value unchanged: for any number , and . The word "identity" conveys the idea that preserves a number's identity under multiplication, just as preserves a number's identity under addition. No other number has this property — is uniquely the multiplicative identity.
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Ch.1 Foundations - Intermediate Algebra @ OpenStax
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Multiple of a Number
Multiplicative Identity
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Whole Numbers
Square Root of a Negative Number Is Not Real
Commutative Property of Addition
Commutative Property of Multiplication
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Associative Property of Multiplication
Additive Identity
Multiplicative Identity
Multiplication by Zero
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Absolute Value
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Unit Conversion Using Conversion Factors
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