Subtracting Fractions [Khan]

What is the least common multiple of 3 and 5?

• 5

• 15

• 25

• 45

Tags

CCSS.5.OA.B.3

To change your denominator from 3 to 15, you multiply by ____.

• 20

• 3

• 5

To go from 5 to 15 you have to multiply by? 

• 2

• 3

• 4

• 5

Tags

CCSS.5.OA.B.3

What is the lowest common denominator for 10 and 8? 

• 18

• 20

• 48

• 40

Tags

CCSS.3.OA.C.7

7 x 4 = 

• 28

• 21

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

To go from 8 to 40 in the denominator you multiply 8 by ____.

• 8

• 5

• 40

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

How many fortieths do you have left? (28 - 25 = __) 

• 4

• 3

• 30