math quiz one

6  x 12 =

• 72
• 84
• 63
• 73

Tags

CCSS.3.OA.C.7

List the factors of 12 & 20, then identify the greatest common factor.
12-
20-
GCF=

• 12- 1, 2, 5, 7  20-10, 20, 30, 40 GCF 10
• 12-1, 12, 24, 36  20-20, 40, 60, 80 GCF 40
• 12-2, 4, 6   20-1, 10, 20 GCF 20
• 12-1, 2, 3, 4, 6, 12  20-1, 2, 4,5,10, 20 GCF 4

Tags

CCSS.4.OA.B.4