Multiplying Fractions & Whole Numbers

Presentation

•

Mathematics

•

4th Grade

•

Practice Problem

•

Hard

•

CCSS

4.NF.B.4B, 5.NF.B.7B, 7.NS.A.3

Standards-aligned

Deborah Hardison

Used 184+ times

FREE Resource

5 Slides • 8 Questions

Multiplying Fractions & Whole Numbers

When we multiply fractions by a whole number we should:

Draw bar models to represent the multiplication problem.
Show the multiplication on a number line.
Sometimes we may need to change our answer from a fraction greater than 1 (an improper fraction) to a mixed number.

Betsy ordered 3 pizzas for her party. 2/3 of the pizzas were left over. How many pizzas were left over?

Use a drawing to show 2/3 x 3. What answer did you get?

The answer would be 6/3. However, that is a fraction greater than 1, so I need to change it into a mixed number.

By decomposing 6/3, I can say it is 3/3 + 3/3 which equals 2.

Multiple Choice

A restaurant uses 1/3 cup of mayonnaise in each batch of salad dressing. How many cups of mayonnaise would they use in 7 batches?

7 1/3 cups

7/13 cups

7/3 cups

17/3 cups

Multiple Choice

Sue is baking cherry pies for dinner. She plans each of the 15 guests will eat 1/5 of a pie. How many pies will she need to bake?

5/15

15/5

Multiple Choice

Tom picked ten plums from a tree in the garden and ate 3/5 of them. How many plums did Tom eat?

Multiple Choice

Frank and his mom visited the zoo. They saw 24 animals.

-¼ of the animals were birds

-The rest were mammals

How many mammals did they see at the zoo?

Multiple Choice

A farmer owns 4 acres of farmland. He grows

potatoes on 3/8 of the land. On how many

acres of land does the farmer grow potatoes?

12 3/8 acres

1 1/2 acres

1 3/8 acres

2 1/2 acres

Let's practice changing fractions greater than one to a mixed number.

Multiple Choice

Show this fraction greater than 1 as a mixed number.

3 3/5

3 2/5

4 4/5

4 3/18

Multiple Choice

How can you show this fraction greater than 1 as a mixed number?

⁷/₃

1 1/3

2/3

2 1/3

Multiple Choice

How can you show this fraction greater than 1 as a mixed number?

14/4

1 4/4

3 1/2

2 2/4

4 2/4

Multiplying Fractions & Whole Numbers

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