Factors and Least Common Multiples

What do you use the greatest common factor (GCF) for?

• To add fractions with different denominators.

• To reduce fraction to its lowest term.

• To add fractions with the same denominators.

What is the least common multiple used for?

• To add fractions with different denominators.

• To reduce fractions to the lowest term.

• To add fractions with the same denominators.

What are the factors of 12?

• 12, 24, 36, 48

• 2, 3, 4, 6 12

• 1, 2, 3, 4, 6,12

• 3 x 4

What is the least common multiple of 4 and 6

• 24

• 2

• 12

• 1/3

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has exactly two factors, 1 and itself.

Tags

CCSS.4.OA.B.4

2 x 2 x 2 is the prime factorization of:

• 6
• 12
• 22
• 8

Which of the following expressions shows 12 as a product of its prime factors? 

• 2 x 6
• 2 + 2 + 2 + 2 + 2 + 2 
• 2 x 2 x 3
• 1 x 2 x 2 x 3

Which is a NOT a factor of 9?

• 0
• 1
• 3
• 9

What is the prime factorization of 32?

• 4 x 8

• 2 x 16

• 2 x 2 x 2 x 2 x 2

• 2 x 2 x 2 x 4

What is the LCM for 3/4 + 2/6

• 12

• 10

• 24

• 18