5.12 Least Common Denominator

What do you need to have when adding unlike fractions?

• common denominator
• common numerator
• common numerator and denominator

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

What is the Least Common Multiple of 5 and 2?

• 6

• 20

• 10

• 25

Tags

CCSS.6.NS.B.4

What is the least common multiple of 4 and 16?

• 4

• 32

• 16

• 64

Tags

CCSS.4.OA.B.4

What is the least common multiple of 4 and 8?

Mathematical Equivalence

ON

Tags

CCSS.6.NS.B.4

What is the least common multiple of 6 and 8?

Mathematical Equivalence

ON

Tags

CCSS.4.OA.B.4

Find the LCM of 8 and 10. Work out the problem in your handout and write your answer here.

(a)  

Tags

CCSS.4.OA.B.4

What is the least common denominator for 1/3 and 3/5?

• 15

• 3

• 30

• 10

Tags

CCSS.5.NF.A.1

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Tags

CCSS.7.NS.A.1C