Finding and Using the Multiplicative Inverse

This video tutorial explains the concept of the multiplicative inverse, also known as the reciprocal. It highlights the difference between the multiplicative inverse and the multiplicative identity, which is 1. The tutorial provides examples of finding the multiplicative inverse of fractions and mixed numbers by interchanging the numerator and denominator. It also demonstrates how to use the multiplicative inverse to write equivalent expressions, particularly in the context of dividing fractions.

What is the multiplicative identity?

• 1

• 0

• Any number

• Infinity

What is the multiplicative inverse of 1/3?

• 3

• 1/3

• 1

• 9

How do you find the multiplicative inverse of a fraction?

• Interchange the numerator and denominator

• Add 1 to the fraction

• Multiply the fraction by 2

• Subtract 1 from the fraction

What is the multiplicative inverse of 1 1/4?

• 4/5

• 5/4

• 1/4

• 1/5

How can you use the multiplicative inverse to divide fractions?

• By dividing the fractions directly

• By adding the fractions

• By using the reciprocal of the divisor and multiplying

• By subtracting the fractions