7° LESSON 3 : Multiplication and Division of Fractions

Lesson 3: Multiplication and Division of Fractions

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Multiplication of Fractions

Division of Fractions.

What is the reciprocal of a fraction?

What if we have a whole number or  a mixed number?

Multiple Choice

What is the reciprocal of   $\frac{3}{5}$  

•  $\frac{1}{35}$  

•  $\frac{1}{5}$  
  

•  $\frac{5}{3}$  

•  $15$  
  

Multiple Choice

 $\frac{2}{3}\cdot\frac{2}{3}$  

•  $\frac{22}{33}$  

•  $\frac{4}{9}$  

•  $\frac{4}{6}$  

•  $\frac{5}{9}$  

Multiple Choice

 $\frac{2}{5}\cdot\frac{5}{8}$  

•  $\frac{1}{4}$  

•  $\frac{25}{58}$  

•  $\frac{4}{5}$  

•  $\frac{1}{8}$  

Multiple Choice

 $\frac{2}{3}\cdot18$  

•  $23$  

•  $15$  
  

•  $12$  

•  $8$  
  

Multiple Choice

 $\frac{2}{3}:\ \frac{5}{6}$  

•  $\frac{2}{7}$  

•  $\frac{4}{5}$  
  

•  $\frac{2}{5}$  

•  $4$  
  

Multiple Choice

 $5\ :\ \frac{1}{2}$  

•  $\frac{1}{10}$  

•  $\frac{4}{5}$  
  

•  $\frac{2}{5}$  

•  $10$  
  

Multiple Choice

 $\frac{1}{2}:\ 5$  

•  $\frac{1}{10}$  

•  $\frac{4}{5}$  
  

•  $\frac{2}{5}$  

•  $10$  
  

Applications of Multiplying and Dividing Fractions

Multiple Choice

You took a math test that has  $40$ questions.  Because of limited time you only answered  $\frac{7}{8}$  of the test. How many questions did you answer in the test?

•  $28$  

•  $35$  

•  $38$  

•  $32$  

Multiple Choice

A turtle walks $\frac{1}{2}$  meters in every minute. How long will it take the turtle to walk  $15$  meters? 

•  $17$  minutes

•  $25$ minutes

•  $30$  minutes

•  $23$  minutes

Multiple Choice

A   $16\frac{2}{3}$  meters string  is to be cut into smaller parts .  How many smaller parts that is  $\frac{2}{3}$  meters each can be made?

•  $17$  

•  $30$  

•  $22$  

•  $25$