Multiplying fractions

Multiplying Fractions

Simplifying Fractions

Always put your answer in simplest form!

Also called lowest terms! Also called reducing!

Multiple Choice

21/34

• SF

• 2/3

• 1/4

• 1/7

Multiple Choice

23/40

• SF

• 11/20

• 12/20

• 3/5

Multiple Choice

30/54

• SF

• 3/5

• 5/9

• 3/4

Multiple Choice

Solve:

$$\frac{2}{5}\cdot\frac{5}{4}$$  

• $$\frac{10}{20}$$  

• $$\frac{7}{9}$$  

• $$\frac{1}{2}$$  

What if there is a whole number?

• A whole number can be written as a fraction by putting it over 1

• Remember, anything divided by 1 is itself!

Multiple Choice

Solve:

$$5\ \cdot\frac{2}{3}$$  

• $$\frac{10}{3}$$  

• $$\frac{15}{2}$$  

• $$5\ \frac{2}{3}$$  

What if there is a mixed number?

• Big C

• Multiple the denominator by the integer (whole number), then add the numerator

• Denominator stays the same

• Draw it out!

Multiple Choice

Which fraction is equal to

$$7\ \frac{3}{5}$$  

• $$\frac{21}{35}$$  

• $$\frac{21}{5}$$  

• $$\frac{38}{5}$$  

What if I need to simplify?

Multiple Choice

Which fraction is equal to

$$7\ \frac{3}{5}$$  

• $$\frac{21}{35}$$  

• $$\frac{21}{5}$$  

• $$\frac{38}{5}$$  

Multiple Choice

There are 28 students in a math class. ⁴⁄₇ of the students were boys. How many boys were in the math class?

• 16 boys
• 12 girls
• 14 girls
• 12 boys

Multiple Choice

DJ drew 36 pictures. He drew ⅔ of them in art class. How many pictures did he draw in art class?

• 12 pictures

• 24 pictures

• 6 pictures

• 18 pictures

Multiple Choice

Multiply these fractions

• 2 / 18
• 2 / 7
• 1 1/3
• 2 / 1.6

Multiple Choice

• 74/9
• 9/74
• 16/9
• 72/9

Multiple Choice

Simplify to lowest terms.

• 7 3/6
• 7 1/2
• 8
• 6/46

Multiple Choice

• 1 3/5

• 1 4/5

• 1 2/5

• No

Multiple Select

Fist-to-Five : How do you feel about multiplying fractions?

• 5: it is easy!

• 4: I'm almost there!

• 3: I need a little more practice

• 2: I need more examples & practice

• 1: I'm pretty confused