Operations on Fractions 8

• 2/12
• 2/24
• 1/12
• 1/6

Tags

CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

• 3/11
• 21/38
• 19/24
• 3/16

Tags

CCSS.7.NS.A.1C

• -4/3
• 13/18
• 4/3
• 2/9

Tags

CCSS.7.NS.A.1C

• 1/40
• 5  1/8
• 6  3/8
• 5/8

Tags

CCSS.4.NF.B.4C

CCSS.4.NF.B.4B

• 1/4
• 9/16
• 5/11
• 6/24

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CCSS.5.NF.B.6

• 6  3/20
• 5  4/9
• 6  4/15
• 8  1/4

Tags

CCSS.5.NF.B.6

• 5/14
• 2  1/3
• -1  1/3
• 2  1/2

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CCSS.6.NS.A.1

It took Earl ½ hour to do his science homework and ⅓ hour to do his math homework.  How long did Earl work on homework?

• ⅖ hour

• ⅙ hour

• ⅚ hour

• ⅕ hour

Answer explanation

Earl worked on his science homework for ½ hour and his math homework for ⅓ hour. To find the total time, convert to a common denominator: ½ = 3/6 and ⅓ = 2/6. Adding these gives 3/6 + 2/6 = 5/6 hour, which is ⅚ hour.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

The weight of an object on the moon is ⅙ its weight on Earth.  If a bowling ball weighs 12½ pounds on Earth, how much would it weigh on the moon?

• 2  1/12 pounds

• 11  1/3 pounds

• 12  1/12 pounds

• 13  2/3 pounds

Answer explanation

To find the weight on the moon, divide the Earth weight by 6. For a 12½ pound bowling ball: 12.5 ÷ 6 = 2.0833 pounds, which is 2 1/12 pounds. Thus, the correct answer is 2 1/12 pounds.

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Roberto needs separate roofing tiles to be cut from one large tile.  How many tiles that are each 14 ⅜ inches in length can he cut from the one large piece of tile that is 100 ⅝ inches long?

• 86  1/4 tiles

• 7  tiles

• 7  3/4 tiles

• 115 tiles

Answer explanation

To find how many 14 ⅜ inch tiles can be cut from a 100 ⅝ inch tile, convert to improper fractions: 14 ⅜ = 115/8 and 100 ⅝ = 805/8. Divide 805/8 by 115/8, which equals 7. Thus, Roberto can cut 7 tiles.

Tags

CCSS.6.NS.A.1