GCF and LCM

Using a Factor Tree, find the prime factorization of 48 in expanded form. 

• 2 x 12 x 12
• 2 x 2 x 2 x 2 x 3 x 3 x 5
• 2 x 2 x 2 x 2 x 3
• 7 x 7 x 7 

Prime numbers have:

• Exactly 2 factors
• 2 pairs of factors
• More than 2 factors
• 1 factor

Tags

CCSS.4.OA.B.4

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4

What is the least common multiple (LCM) of 4 and 10?

• 4
• 40
• 15
• 20

Tags

CCSS.4.OA.B.4

Find the prime number

• 10
• 9
• 7
• 4

Tags

CCSS.4.OA.B.4

What is the LCM of 2, 4, 6?

• 6
• 12
• 4
• 2

Tags

CCSS.6.NS.B.4