Adding and Subtracting Fractions with Unlike Denominators

Why can't you add fractions with different denominators directly?

• Because the numerators are different

• Because the denominators are different

• Because the fractions are not in simplest form

• Because the fractions are improper

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the 'big one' in fraction conversion?

• A fraction with a denominator of one

• A fraction with a numerator of one

• A fraction with the same numerator and denominator

• A fraction with a numerator of zero

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

How do you convert 3/4 to a fraction with a denominator of 8?

• Multiply by 2/2

• Multiply by 4/4

• Multiply by 3/3

• Multiply by 1/1

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the least common multiple (LCM) of 3 and 4?

• 6

• 9

• 15

• 12

How many twelfths are in 2/3?

• 6/12

• 8/12

• 9/12

• 10/12

Tags

CCSS.4.NF.B.4A

CCSS.4.NF.B.4B

What is the sum of 8/12 and 9/12?

• 16/12

• 18/12

• 15/12

• 17/12

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the least common multiple of 2 and 5?

• 20

• 10

• 15

• 25

How do you convert 1/2 to a fraction with a denominator of 10?

• Multiply by 2/2

• Multiply by 3/3

• Multiply by 4/4

• Multiply by 5/5

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the result of 7/4 + 2/4?

• 11/4

• 8/4

• 10/4

• 9/4

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the key takeaway from this lesson?

• You can add any fractions directly

• You can only add fractions with the same size pieces

• You can subtract fractions without converting

• You can multiply fractions without converting

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D