Divide Whole Numbers by fractions

Divide Whole Numbers by fractions

by Omar Shishani

​Reciprocals

​Multiplicative inverse

Multiple Choice

What is the recriprocal of 4/5

• 4/5
• 5/4
• 5/1
• 1/5

Multiple Choice

What is the recriprocal of 5

• 5/1
• 1/5

Multiple Choice

What is the reciprocal of 3/4?

• 4/3
• 3/4
• none of the above

Multiple Choice

Find the reciprocal 1/7

• 7

• 1/7

Multiple Choice

What is the reciprocal of 12/7?

• 7/12
• 1  5/7
• 3/6
• 12/7

Multiple Choice

What is the reciprocal of 2/3?

• 2/3
• 1/4
• 3/2
• 4/6

Multiple Choice

What is the reciprocal of 3/10?

• 3/10
• 10/3
• 3 1/3
• 3.333

Poll

How do we divide whole numbers by fractions?

• Keep Change Flip

• Flip Change Keep

• Change Flip Keep

• Keep Flip Change

Multiple Choice

$$2\div\frac{1}{2}$$  

• 1
• 4

• 1/3
• 1/4

Multiple Choice

Evaluate:

3 divided by 1/9

• 27

• 1/27

• 3

• 1/3

Multiple Choice

Evaluate:

• 1/30

• 6/5

• 30

• 1 1/5

Multiple Choice

Evaluate:

$$5\div\frac{9}{2}$$  

• 10/9

• 9/10

• 5/9

Match

Match the following

• $$2\div\frac{3}{7}$$  

• $$5\div\frac{4}{3}$$  

• $$3\div\frac{8}{3}$$  

• $$\frac{2}{3}\div5$$  

• $$\frac{4}{5}\div7$$  

14/3

15/4

9/8

2/15

4/35

• 14/3

• 15/4

• 9/8

• 2/15

• 4/35

Multiple Choice

It takes 1/2 of a cup of flour to make a batch of pancakes.  Turki has 6 cups of flour.  How many batches of pancakes can he make?

• 12 batches of pancakes
• 3 batches of pancakes

• 1/12 batches of pancakes

Multiple Choice

Mohammed has 2 cups of muffin batter.  He uses 1/4 of the batter for each muffin.  How many muffins can he make with the batter?

• 1/2
• 2
• 6
• 8

Multiple Choice

Jassim needs 1/3 of a banana for each ice cream sundae. How many sundaes can he make with 3 bananas?

• 3
• 6
• 9
• 12

Multiple Choice

Abdullah has a 2-pound bag of cat food. His cat eats 1/8 of a pound each day. How many days will the food last? Find the correct equation.

• 2 x 1/8 = 2/8 days

• 1/8 ÷ 2 = 20 days

• 1/8 ÷ 2 = 1/16 day

• 2 ÷ 1/8 = 16 days