Understanding Multiplicative Inverses

The video tutorial explains how to determine the multiplicative inverse of numbers, including negative 12, positive nine, and two-thirds. It demonstrates that the multiplicative inverse is the reciprocal of a number, which when multiplied by the original number results in one. The tutorial provides examples with both whole numbers and fractions to illustrate the concept.

What is the multiplicative inverse of -12?

• -12

• 1/12

• -1/12

• 12

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

How do you find the reciprocal of a fraction?

• Subtract the denominator from the numerator

• Add the numerator and denominator

• Multiply the numerator by 2

• Interchange the numerator and denominator

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of multiplying a negative number by another negative number?

• Negative

• Undefined

• Zero

• Positive

What is the multiplicative inverse of 9?

• -1/9

• -9

• 9

• 1/9

Which of the following is the reciprocal of 9?

• -1/9

• -9

• 1/9

• 9

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What is the multiplicative inverse of 2/3?

• 3/2

• 2/3

• -3/2

• -2/3

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What do you get when you multiply 2/3 by its reciprocal?

• 1

• 0

• 2/3

• 3/2

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What is the general rule for finding the multiplicative inverse of a number?

• Multiply the number by 2

• Subtract 1 from the number

• Add 1 to the number

• Find the reciprocal of the number

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

If a number is expressed as a fraction, how can you find its multiplicative inverse?

• Divide the fraction by 2

• Multiply the fraction by 2

• Add 1 to the fraction

• Flip the fraction

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CCSS.6.NS.B.4

What is the product of a number and its multiplicative inverse?

• 1

• 0

• The reciprocal of the number

• The number itself

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CCSS.6.NS.B.4