Comparing Fractions with Unlike Denominators

This lesson teaches how to compare fractions with unlike denominators using three steps: finding a common denominator, determining the numerators, and comparing the fractions. The process involves using the least common multiple to find a common denominator, adjusting the numerators accordingly, and then comparing the fractions using less than, greater than, or equal signs. The lesson includes practice problems for students to apply the steps learned.

What is the first step in comparing fractions with different denominators?

• Use the greater than sign

• Multiply the numerators

• Find the least common multiple

• Draw a picture of the fractions

What is the least common denominator for fractions with denominators 5 and 3?

• 10

• 15

• 18

• 8

What do you multiply the numerator by if the denominator is multiplied by 3 to reach a common denominator of 15?

• 5

• 6

• 3

• 2

After finding the common denominator, what is the next step?

• Compare the fractions

• Simplify the fractions

• Find the equivalent fractions

• Draw the fractions

Which symbol is used to show that one fraction is larger or smaller than another?

• +

• -

• =

• < or >

Which fraction is larger: 9/15 or 10/15?

• Cannot be determined

• 10/15

• 9/15

• They are equal

To find a common denominator for 7 and 3, which multiple do they share?

• 28

• 21

• 35

• 14

What is the common denominator for fractions with denominators 7 and 3?

• 10

• 21

• 14

• 28

When converting fractions to have a common denominator, what must you always do?

• Multiply only the numerator

• Add the same number to numerator and denominator

• Multiply only the denominator

• Multiply both the numerator and denominator by the same number

If you multiply the denominator by 7 to find a common denominator, what do you do to the numerator?

• Multiply it by 7

• Divide it by 7

• Add 7 to it

• Nothing