Subtracting Fractions with Unlike Denominators

In this video, Mr. J teaches fifth-grade students how to subtract fractions with unlike denominators. The process involves finding a common denominator, renaming fractions, subtracting, and checking if the result can be simplified. The video includes four examples, each demonstrating the step-by-step process of subtracting fractions. Students are encouraged to practice along with the video and attempt a mastery check at the end.

What is the first step in subtracting fractions with unlike denominators?

• Find a common denominator

• Find a common numerator

• Simplify the fractions

• Multiply the fractions

What is the least common multiple of 12 and 8?

• 48

• 32

• 24

• 16

How do you rename the fraction 5/8 to have a denominator of 24?

• Multiply both numerator and denominator by 4

• Multiply both numerator and denominator by 3

• Multiply both numerator and denominator by 5

• Multiply both numerator and denominator by 2

What is the result of subtracting 5/8 from 10/12 after renaming the fractions?

• 1/12

• 5/12

• 5/24

• 1/24

What is the least common multiple of 9 and 18?

• 9

• 18

• 27

• 36

What is the result of subtracting 1/18 from 3/9 after renaming the fractions?

• 5/18

• 2/18

• 4/18

• 1/18

What is the least common multiple of 16 and 4?

• 8

• 4

• 16

• 12

What is the result of subtracting 3/4 from 13/16 after renaming the fractions?

• 1/16

• 2/16

• 3/16

• 4/16

What is the least common multiple of 2 and 3?

• 3

• 6

• 2

• 5

What is the result of subtracting 1/3 from 1/2 after renaming the fractions?

• 1/4

• 1/2

• 1/6

• 1/3