Finding Least Common Denominators With Unlike Denominators

What must you have to add and subtract fractions?

• Common numerators
• Different numerators
• Different denominators
• Common denominators

The multiples of 7 are
1,6,7,9,3,6,4

• True
• False

Does the Least Common Multiple become the Least Common Denominator?

• Yes

• No

Which of the following is a multiple of 7?

• 28
• 48
• 71
• 45

Which one is a multiple of 4?

• 33
• 22
• 18
• 24

What is the LCM of 3 and 4? 

• 4
• 16
• 12
• 24

What is the LCM of 7 and 8? 

• 7
• 8
• 42
• 56

Find the LCM of 6 and 24. 

• 6
• 12
• 24
• 3

What number could be a common denominator for these two fractions?
2/3   and   3/4

• 3
• 4
• 7
• 12

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30
• 11
• 6
• 5