Multiply Fractions by Whole Numbers

We can restate the problem 2/3 x 5 as "2/3 of 5." For instance, if we have 5 pounds of sugar and we only need 2/3 of it, how could we think about that? We would find 2/3 of 5 by multiplying 2/3 x 5.

What is 2/3 of 5 pounds of sugar?

• 7/3

• 7/4

• 3 1/3

• 11/3

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Multiplication is combining equal groups. If we want to find out how much flour we need for three cookie recipes, we can multiply what we need for one batch by 3. If we need 3/4 cup of flour for one recipe, then we would say we need 3 groups of 3/4 cup of flour. What is 3 x 3/4?

• 2 1/4

• 4/9

• 6/4

• 9/12

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4A

16 x 3/5

• 9 2/5

• 8 8/5

• 9 3/5

• 19/5

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

9 x 5/6

Remember to change your answer to a mixed number and simplify your fraction (if possible).

• 45/54

• 2 1/2

• 7 1/2

• 7 5/6

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

3/10 x 7

Be careful how you write this down... some of you were confused before the break. This is 3/10 times 7.

• 3/70

• 2 1/10

• 21/70

• 10/10 or 1 whole

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

What expression is modeled above?

• 5 x 1/6

• 1/5 x 7

• 5/30

• 6 x 1/5

Tags

CCSS.5.NF.B.7A

CCSS.5.NF.B.7C

What is the product of
⁵/₈ and 6? 

• ⁵/₁₀₈

• 3 ³/₄

• 2 ¹/₃

• 6 ⁵/₁₈

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Alex ate 3/4 of a sub. Anthony ate 3 times as much. How much sub did Anthony eat?

• 9 subs

• 2 1/4 sub

• 2 subs

• 2 3/4 sub

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Select all answers equal to 4/5 x 7/12.

• 28/60

• 14/30

• 11/17

• 7/15

• 2/6

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Mrs. Colucci is having a taco party. She using ¹/₅ pound of beef for each taco. If she plans on making 24 tacos, how much beef will she need? (Simplify your answer if possible.)

• 2 ⁴/₅ pound of beef

• 4  ⁴/₅ pound of beef

• 5  ⁴/₅ pound of beef

• ⁵/₂₄ pound of beef

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C