Honors Unit 1 Lesson 7 - Reciprocals

Honors Unit 1 Lesson 7 - Reciprocals

Which is correct?

• A.) ⅝ ÷ ¼ = w

• B.) ¼ ÷ ⅝ = w

Multiple Choice

Which is the correct division equation?

• $\frac{5}{8}\ \div\ \frac{1}{4\ }\ =\ w$

• $\frac{1}{4}\div\ \frac{5}{8}\ =\ w$

Now solve!

 ⅝ ÷ ¼ 

Fill in the Blank

What is the width of the parking lot? (LEAVE IMPROPER AND ONLY USE NUMBERS)

Another One!

What does "per" mean in this situation?

Multiple Choice

What does "per" mean in this situation?

• add

• subtract

• multiply

• divide

Great now solve!

5,400,000 ÷ 12

Fill in the Blank

How much did DJ Khaled pay per Lamborghini? (DO NOT USE WORDS OR SYMBOLS)

Write in you notes!

Examples

***You must make mixed numbers improper!!!!!

Get READY!!!

Fill in the Blank

What is the reciprocal of 5/12? (LEAVE ALL IMPROPER)

Fill in the Blank

What is the reciprocal of 40? (LEAVE ALL IMPROPER)

Fill in the Blank

What is the reciprocal of 2 and 1/2 ? (LEAVE ALL IMPROPER)

 $2\ \frac{1}{2}$  

How to find the reciprocal:

• EASY! When you hear reciprocal...

• think RE-FLIP-RO-CAL!!!!

Get Ready to FLIP! 

• 1/3 x 3/1 = 1

• 4 1/2 x 2/9 = 1

Fill in the Blank

 $4\ \frac{1}{5}\cdot\ ?\ =\ 1$  
What is "?" to make this a true equation?

Fill in the Blank

 $7\ \frac{3}{10}\cdot\ ?\ =\ 1$  
What is "?" to make this equation true?

Now let's multiply by the reciprocal!

Fill in the Blank

 $3\ \frac{1}{3}\ \div\ \frac{2}{9}\ =\ x$  
Solve for x.

Fill in the Blank

 $6\ \frac{2}{5}\div\ 3\ =\ x$  Solve for x. (Leave improper)

Fill in the Blank

 $\frac{9}{2}\div\frac{3}{8}=x$  Solve for x.