Dividing a Fraction by a Whole Number

Dividing a Fraction by a Whole Number

by Ms Tout

Warm-Up​

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Multiple Choice

$$\frac{2}{3}\times\frac{5}{1}$$  

• 7/3 = 2 1/3

• 10/15

• 2/15

• 10/3 = 3 1/3

Multiple Choice

$$\frac{1}{3}\times\frac{2}{5}$$  

• 2/15

• 3/8

• 3/15 = 1/5

• 3/10

A fraction is a . . . ​

Division Problem​

Multiple Choice

A fraction is a . . . 

• Division Problem

• Multiplication Problem

• Subtraction Problem

• Addition Probelm

Multiple Choice

How do you write 5 divided by 3 as a fraction?

• 5/3

• 3/5

Multiple Choice

Which of the following is means 10/7?

• 10 ÷ 7

• 7 ÷ 10

​Invisible Math

​These are math concepts that are known but not seen.

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​Most important to remember:

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​There is a denominator of 1 for all whole numbers.

Multiple Choice

Write 21 as a fraction

• $$0.21$$  

• $$\frac{1}{21}$$  

• $$\frac{21}{1}$$  

• $$12$$  

Multiple Choice

Write 5 as a fraction

• $$0.5$$  

• $$\frac{1}{5}$$  

• $$\frac{5}{1}$$  

• $$5$$  

​Dividing Fractions

• ​Step 1: Rewrite the whole number as fraction

• ​Step 2: Keep the First Fraction

• ​Step 3: Change

• ​Step 4: Flip the second Fraction

• ​Step 5: Multiply Across

• ​Step 6: Simplify if needed

​Example:

• ​Step 1: Rewrite 3 as a fraction:

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• ​Step 2: K.C.F.

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• ​Step 3: Multiply

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• ​Step 4: Simplify If needed

​Example:

• ​Step 1: Rewrite 3 as a fraction:

​

• ​Step 2: K.C.F.

​

• ​Step 3: Multiply

​

• ​Step 4: Simplify If needed

Multiple Choice

4 ÷ ½ = _

• 4

• 2

• 16

• 8

Multiple Choice

1/4 ÷ 5

• 1/20

• 1/9

• 5/20

• 1/4

Multiple Choice

6 ÷ ⅔ = _

• 4

• 9

• 12

• 24

Multiple Choice

7 ÷¼ =_

• 1 3/4

• 3/4

• 28

• 11

Multiple Choice

⅗ ÷ 4 =

• 1/20

• 3/20

• 12

• 12/20

Multiple Choice

8 divided by 1/2

• 1/4

• 4

• 1/16

• 16

Multiple Choice

4 ÷ 1/4 =

• 8

• 1/8

• 1/16

• 16