Adding and Subtracting Fractions with Unlike Denominators

What is needed to add or subtract fractions with different denominators?

• Subtraction of denominators

• A common denominator

• A common numerator

• Equivalent numerators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the Least Common Multiple (LCM) used for in fraction operations?

• To find the common denominator

• To multiply the fractions

• To simplify the fraction

• To divide the fractions

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

How do you find the LCM of two numbers?

• Add the two numbers

• Find the first common multiple when skip counting

• Multiply the two numbers

• Subtract one number from the other

What must be done to the numerator when the denominator is changed?

• It is multiplied by the same factor

• It is subtracted by the same factor

• It is divided by the same factor

• It remains the same

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

After finding equivalent fractions, what is the next step in adding fractions with unlike denominators?

• Find the LCM again

• Simplify the fraction

• Add the numerators

• Multiply the fractions

Tags

CCSS.7.NS.A.1C

How do you simplify the fraction 17/12?

• 1 7/12

• 2/12

• 1 5/12

• 5/12

What is the result of subtracting 1/4 from 3/5 after finding a common denominator?

• 2/20

• 7/20

• 2/5

• 3/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the LCM of 9 and 3?

• 9

• 3

• 18

• 27

After converting to equivalent fractions, what is the final step in the process?

• Converting back to the original fractions

• Finding a new LCM

• Adding or subtracting the numerators

• Multiplying the denominators

Tags

CCSS.7.NS.A.1C

Why is it important to practice adding and subtracting fractions with unlike denominators?

• To improve multiplication skills

• To understand fractions better

• To be able to simplify fractions

• All of the above

Tags

CCSS.7.NS.A.1C