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Multiplicative
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Identity
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1 is called multiplicative identity.

a × 1 = 1 × a = a

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Multiplicative Inverse
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Reciprocal of a number is called multiplicative inverse

Like

Multiplicative inverse of 2 = 1/2

Multiplicative inverse of 4 = 1/4

Let’s do some more examples and check as well

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Multiplicative inverse of –6

Multiplicative inverse for −6 = 1/(-6) = (-1)/6

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Check
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: Number × Multiplicative Inverse = 1

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L.H.S
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: Number × Multiplicative Inverse

= −6 × (-1)/6

= 1

= R.H.S

Hence, (-1)/6 is Multiplicative inverse of –6

#### Multiplicative inverse of 2/3

Multiplicative inverse for 2/3 = 3/2

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Check
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: Number × Multiplicative Inverse = 1

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L.H.S
__
: Number × Multiplicative Inverse

= 2/3 × 3/2

= 1

= R.H.S

Hence, 3/2 is Multiplicative inverse of 2/3

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Multiplicative inverse of (-4)/5

Multiplicative inverse for (-4)/5 = 5/(−4) = (−5)/4

**
Check
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: Number × Multiplicative Inverse = 1

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L.H.S
__
: Number × Multiplicative Inverse

= (-4)/5 × (-5)/4

= 1

= R.H.S

Hence, (-5)/4 is Multiplicative inverse of (-4)/5

#### Multiplicative inverse of 9/80

Multiplicative inverse for 9/80 = 80/9

**
Check
**
: Number × Multiplicative Inverse = 1

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L.H.S
__
: Number × Multiplicative Inverse

= 9/80 × 80/9

= 1

= R.H.S

Hence, 9/80 is Multiplicative inverse of 80/9