Adding and Subtracting Fractions with Unlike Denominators No Improper to Mixed Numbers

What is the process of making two fractions with unlike denominators able to be added or subtracted called?

• Finding the least common multiple or least common denominator

• Addition

• Multiplication

• Reverse multiplication

Tags

CCSS.7.NS.A.1C

When adding and subtracting fractions, which value needs to be the same in all values being added/subtracted?

• Numerator

• Denominator

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Tags

CCSS.3.NF.A.3C

What is the first step of adding or subtracting two fractions?

• Checking if the numerators are the same

• Checking if the denominators are the same or different

• Checking that the fractions are equal

• Adding or subtracting

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the sum of 2/3 and 1/5?

• 9/10

• 5/15

• 13/15

• 7/15

Tags

CCSS.7.NS.A.1C

• - 1  7/40
• 15/40
• - 1 10/40
• 17/40

Tags

CCSS.7.NS.A.1C

Is this a correct answer?

• Yes, the student correctly added.

• No, you cannot add unlike denominators

• No, 5 + 7 is not 12

• No, 2 + 3 is not 5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 6      7/10
• 3/10
• -2   7/10
• 2    7/10

Tags

CCSS.7.NS.A.1C

Adding & Subtracting Fractions with

UNLIKE Denominators

• I'm ready to try

• Let's do this!

• I'm not sure about these.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the sum of these fractions in lowest terms?

• 4/5

• 3/20

• 17/20

• 4/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2