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

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!!!