Multiplication and Division Methods

The video tutorial explains how to find missing numbers in equivalent fractions using three methods: multiplication, division, and cross multiplication. Each method is demonstrated with examples, showing how to manipulate numerators and denominators to find the missing values. The tutorial concludes with additional examples and a recap of the methods discussed.

What is the first step in finding a missing number in equivalent fractions?

• Look at the numerators

• Look at the denominators

• Add the fractions

• Subtract the fractions

In the multiplication method, if the denominator of the missing numerator is 15 and the other denominator is 5, what should you multiply 5 by?

• 5

• 2

• 3

• 4

When using the multiplication method, what must you do to the numerator if you multiply the denominator by 3?

• Multiply the numerator by 3

• Subtract 3 from the numerator

• Divide the numerator by 3

• Add 3 to the numerator

What is the result of 5 multiplied by 3 in the multiplication method?

• 10

• 12

• 15

• 18

What is the result of 5 multiplied by 3 in the multiplication method?

• 15

• 18

• 12

• 10

In the division method, if 21 is the denominator of the missing numerator and the other denominator is 3, what should you divide 21 by?

• 9

• 7

• 5

• 3

Using the division method, if you divide the denominator by 7, what should you do to the numerator?

• Add 7 to the numerator

• Divide the numerator by 7

• Multiply the numerator by 7

• Subtract 7 from the numerator

In the division method, what is the result of 21 divided by 7?

• 2

• 5

• 3

• 4

In the division method, what is the result of 21 divided by 7?

• 2

• 3

• 5

• 4

In the cross multiplication method, what do you do if neither of the numerators are multiples of each other?

• Cross multiply the numerators and denominators

• Divide the numerators by each other

• Subtract the numerators

• Add the numerators