Adding and Subtracting Fractions with Unlike Denominators

The video tutorial by Mr. J covers how to add and subtract fractions with unlike denominators. It includes two examples each for addition and subtraction, demonstrating the process of finding a common denominator, renaming fractions, and performing the arithmetic operations. The tutorial emphasizes the importance of simplifying the final answer and provides links to additional resources for further learning.

Why do fractions need a common denominator to be added or subtracted?

• To simplify the fractions before adding or subtracting

• To change the value of the fractions

• To make the fractions larger

• To align the parts being combined or removed

What is the least common multiple of 9 and 3?

• 9

• 18

• 3

• 27

How do you find the least common multiple of two numbers?

• List out multiples of each and find the smallest common one

• Add them together

• Divide them

• Multiply them

What is the simplified form of 19/30?

• 9/15

• 1/2

• 19/30

• 2/5

What is the least common multiple of 6 and 12?

• 6

• 24

• 36

• 12

How do you rename a fraction to have a common denominator?

• Divide the numerator and denominator by the same number

• Subtract the denominator from the numerator

• Add the same number to numerator and denominator

• Multiply the numerator and denominator by the same number

What is the simplified form of 8/20?

• 8/20

• 4/10

• 2/5

• 1/3

What is the common denominator for fractions with denominators of 10 and 4?

• 8

• 40

• 10

• 20

What is the result of subtracting 2/4 from 9/10 when simplified?

• 7/10

• 2/5

• 3/5

• 1/2

Why is it important to simplify fractions after adding or subtracting?

• To ensure the fraction is in its most basic form

• To find the highest possible denominator

• To increase the value of the fraction

• To change the fraction into a whole number