Unit 1 Review: Ratios and Proportional Reasoning

Unit 1 Review

Ratios and Proportional Reasoning

Poll

If I said.....

Find the factors of 18.

How confident are you that you could solve this?

• Not confident at all.

• Somewhat confident.

• Very confident.

​Lets Practice!!

​Find the factors of 18.

​Label the factors of 18.

​2

​9

​6

​1

​18

​3

Multiple Choice

Find the factors of 8. 

• 1, 2, 4, 6, 8

• 1, 2, 4, 8

• 1, 2, 3, 4, 5, 6, 7, 8

• 2, 4, 6, 8

Multiple Choice

Find the factors of 24.

• 1, 3, 5, 7, 9, 12, 24

• 1, 2, 3, 4, 5, 6, 8, 10, 12, 24

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 2, 3, 5, 7, 9, 12, 24

Multiple Choice

Label the factors of 16.

Poll

If I said...

Find the GCF and LCM of 10 and 15.

How confident would you be?

• Not confident at all.

• Somewhat confident.

• Very confident.

​Lets Practice!!

​Greatest Common Factor

​ (biggest) (same) (part)

​

​10: 1, 2, 5, 10

​

​15: 1, 3, 5, 15

​

​

​GCF= ??

​Least Common Multiple

​(smallest) (same) (count-up)

​

​10: 10, 20, 30, 40, 50, 60, 70

​

​15: 15, 30, 45, 60, 75, 90

​

​

​LCM= ??

Multiple Choice

Find the GCF of 6 and 12.

• 2

• 3

• 6

Multiple Choice

Find the LCM of 2 and 7.

• 7

• 14

• 28

Poll

If I said...

Find the missing parts of the factor tree.

How confident would you be?

• Not confident at all.

• Somewhat confident.

• Very confident.

​Lets practice!!

​Find the missing parts of the factor tree.

Poll

If I said...

find the prime factorization of 18.

How confident would you be?

• Not confident at all.

• Somewhat confident.

• Very confident.

​Example:

​Prime factorization of 18

​3 x 3 x 2 = 18

​

​

​Prime factorization - Breaking down all the factors.

Multiple Choice

Find the missing parts of the factor tree.

Fill in the Blanks

What is the missing red number?

Multiple Choice

Find the prime factorization of 100.

• 10 x 2 x 5 = 100

• 20 x 5 = 100

• 2 x 2 x 5 x 5 = 100

Poll

If I asked...

What are prime and composite numbers?

How confident are you that you could explain?

• Not confident at all

• Somewhat confident

• Very confident

​ Prime

​The only factors are one and itself.

​

​1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37

​

​Multiple factors.

​

​

​4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21

​

Composite

Multiple Choice

Is 23 prime or composite?

• Prime

• Composite

Multiple Choice

Is 21 prime or composite?

• Prime

• Composite

Poll

If I said...

show me all three ways to write a ratio using 2 bikes and 4 wheels.

How confident would you be finding the answer?

• Not confident at all

• Somewhat confident

• Very confident

Open Ended

What do ratios do?

Multiple Select

Click on ALL three ways to write 1 rainbow to 2 clouds as a ratio.

• 1 rainbow : 2 clouds

• 1 rainbow to 2 clouds

• 1 rainbow  $$\div$$  2 clouds

• $$\frac{1\ rainbow}{2\ clouds}$$  

Multiple Choice

Which is one way to write 26 goats and 54 sheep as a ratio.

• 26 sheep: 54 goats

• $$\frac{26}{54}$$  

• 26 goats to 54 sheep

• 26 : 54

Poll

If I said...

Complete the ratio table.

How confident would you be?

• Not confident at all.

• Somewhat confident

• Very confident

Lets practice!!

Multiple Choice

Fill in the empty box.

• 12

• 24

• 30

• 15

Poll

If I said...

Graph the table shown on a coordinate plane.

How confident would you be?

• Not confident at all

• Somewhat confident

• Very confident

Example

Multiple Choice

Which is the correct graph for this table.

Multiple Choice

Which is the correct graph for this table.

​Good job everyone!!!