GCF, LCM, Adding Fractions

When adding fractions with unlike denominators, what is the first thing you need to do?

• Find the LCM

• Find the GCF

• Add the Numerator

• Add the Denominator

What is the least common multiple (LCM) of 2 and 3?

• 6
• 8
• 20
• 10

Tags

CCSS.4.OA.B.4

What is the least common multiple (LCM) of 5 and 20?

• 4
• 5
• 20
• 100

Tags

CCSS.4.OA.B.4

What is the least common multiple (LCM) of 6 and 8?

• 6
• 8
• 48
• 24

Tags

CCSS.4.OA.B.4

GCF of 4 and 6

• 2
• 3
• 4
• 6

Tags

CCSS.6.NS.B.4

GCF of 12 and 18

• 3
• 4
• 6
• 2

Tags

CCSS.6.NS.B.4

GCF of 32 and 40

• 2
• 4
• 6
• 8

Tags

CCSS.6.NS.B.4

• ⁵/₁₄

• ³/₇

• ⁵/₇

• ⁵/₁₄

Tags

CCSS.4.NF.B.3A

Solve.  2/3 + 7/12

• 3/5
• 9/15
• 15/12
• 5/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common denominator of 1/9 and 2/3?

• 6
• 3
• 9
• 21

Tags

CCSS.4.NF.A.2