Multiply Fractions by Fractions

Multiplying Fractions

​First multiply the numerators, then multiply the denominators.

Simplify if possible!

Multiple Choice

Solve:

$$\frac{2}{5}\cdot\frac{5}{4}$$  

• $$\frac{10}{20}$$  

• $$\frac{7}{9}$$  

• $$\frac{1}{3}$$  

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:

$$5\ \cdot\frac{2}{3}$$  

• $$\frac{10}{3}$$  

• $$\frac{15}{2}$$  

• $$\frac{10}{15}$$  

What if there is a mixed number?

• Get MAD

  • Multiple the denominator by the whole number, then add the numerator

  • Denominator stays the same

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 Select

Reflection: 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