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

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

16 x 3/5

• 9 2/5

• 8 8/5

• 9 3/5

• 19/5

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

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

What expression is modeled above?

• 5 x 1/6

• 1/5 x 7

• 5/30

• 6 x 1/5

What is the product of
⁵/₈ and 6? 

• ⁵/₁₀₈

• 3 ³/₄

• 2 ¹/₃

• 6 ⁵/₁₈

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

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

• 28/60

• 14/30

• 11/17

• 7/15

• 2/6

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