Adding and Subtracting Rational Fractions

What is the Least Common Denominator(LCD) of 2/3 + 1/2?

• 2

• 3

• 6

• 12

What is the Least Common Denominator of 1/5 + 2/10

• 5

• 10

• 50

• 15

A plumber is fitting a water pipe that is 3/4 foot long on to a water pipe that is 2/12 foot long. How long will the finished pipe be?

• 11/12 foot

• 8/16 foot

• 2/12 foot

• 1 foot

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Robert made a fruit salad with 11/12 of a pound of melon and 1/6 of a pound of berries. How many pounds of fruit did Robert use in all?

• 1 1/12

• 3/4

• 2/3

• 1 1/2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

10  3/4
-7  1/4
________

• 3  1/4

• 4  1/2

• 3  1/2

• 18

Tags

CCSS.7.NS.A.1C

9  5/9
- 6  5/6
________

• 3  13/18

• 3  10/18

• 2  13/18

• 2  1/2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

3/9 + 1/3 =

• 7/9

• 4/12

• 2/3

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum of these fractions?

• 4/5

• 3/20

• 17/20

• 4/20

Tags

CCSS.7.NS.A.1C

• 1/12
• 1
• 2/35
• 23/25

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

3/7+2/21

• 13/21

• 6/8

• 11/21

• 17/30

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2