Problem Solving on Multiplying and Dividing Fractions

A stack of boards is 21″ high. Each board is 1¾″ thick. How can you find the number of boards?

• 21 × 1¾
• 1¾ ÷ 21
• 21 ÷ 1¾

There are 12 yards of fabric. Each pillow uses 2/3 yard. How many pillows can be made?

• 8 pillows
• 12 pillows
• 18 pillows

Nine identical cakes weigh a total of 20¼ pounds. How much does each cake weigh?

• 4/9 pound
• 2⋅1/9 pounds
• 2⋅9/36 pounds
• 2⋅1/4 pounds

Twelve whole pizzas are eaten. Each person eats ¼ pizza. How many people eat pizza?

• 48 people 
• 16 people
• 8 people
• 3 people

Tags

CCSS.5.NF.B.7B

CCSS.5.NF.B.7C

Answer the question in the picture.

• 1) Larger 2) Smaller
• 1) Smaller 2)Larger

Tags

CCSS.5.NF.B.5A

The area of a rectangle is 25/42 and its width is 5/6. What is the length?

• 1⋅3/7
• 1⋅2/5
• 5/7
• 125/252

Tags

CCSS.5.NF.B.4B

A 21-foot long rope is cut into 3/8-foot pieces. Which expression finds the number of pieces?

• 21 ÷ 3/8
• 21 × 3/8
• 3/8 ÷ 21
• 21 − 3/8

When 7/8 is divided by a number, the result is 6/7. What is that number?

• ¾
• 48/49
• 49/48
• 4/3

Tags

CCSS.6.NS.A.1

A rectangle with an area of 15/32 has a width of 5/8. What is the perimeter of the rectangle?

• ¾
• 1⋅3/8
• 2 1/2
• 2¾

Tags

CCSS.7.EE.B.3

Answer the question in the picture.

• 2 3/4 X 8 must be > 8 because 2 groups of 8 is 16.
• 2 3/4 X 8 must be < 8 because a fraction makes it smaller.

Tags

CCSS.5.NF.B.5B