Dividing Whole Numbers by Fractions: Multiplying by the Reciprocal

The video tutorial explains how to divide whole numbers by fractions using the concept of reciprocals. It demonstrates that dividing by a fraction is equivalent to multiplying by its reciprocal. Several examples are provided to illustrate this method, showing that the quotient can be found by multiplying the whole number by the reciprocal of the fraction. The tutorial also covers the definition of reciprocals and applies the concept to a practical problem involving baking cookies.

What is the result of dividing 2 by 1/4?

• 10

• 8

• 6

• 4

How can you solve 5 divided by 1/2 using multiplication?

• Multiply 5 by 2

• Multiply 5 by 1/2

• Multiply 5 by 1

• Multiply 5 by 5

What is the reciprocal of 1/3?

• 1/3

• 3/1

• 1/2

• 2/1

If Alia has 6 sticks of butter and needs 1/3 of a stick per dozen cookies, how many dozens can she make?

• 18

• 12

• 15

• 20

What does it mean to find the reciprocal of a fraction?

• Add 1 to the fraction

• Multiply the fraction by 2

• Subtract 1 from the fraction

• Switch the numerator and denominator