Oct 29th / 30th

What is a proportion?

• When two ratios can be simplified
• When two ratios are equivalent and show the same value
• When two ratios have the exact same numbers
• When two ratios can be multiplied by 2

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.3

Solve the proportion.

• q=2
• q=9
• q=4.5
• q=6

Tags

CCSS.7.RP.A.2B

Solve for x 

• x = 1/10
• x = 10
• x = 4
• x = 5

Tags

CCSS.7.RP.A.2C

The county requires 2 teachers for every 45 students. Which proportion give the number t of teachers needed for 315 teachers.

• $\frac{45\ students}{2\ teachers}=\frac{t}{315\ students}$

• $\frac{2\ teachers}{45\ students}=\frac{t}{315\ students}$

• $\frac{45\ students}{t}=\frac{2\ teachers}{315\ students}$

• $\frac{315\ students}{2\ teachers}=\frac{t}{45\ students}$

Tags

CCSS.7.RP.A.3

Chase makes $65 for 3 hours of work. Write a proportion to determine how many hours h Chase worked when he made $150.

•  $\frac{3}{65}=\frac{150}{h}$  

•  $\frac{65}{3}=\frac{h}{150}$  

•  $\frac{65}{150}=\frac{h}{3}$  

•  $\frac{65}{3}=\frac{150}{h}$  

Tags

CCSS.7.RP.A.2C

The ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there are 12 boys in the class?

• 12 girls
• 15 girls
• 5.3 girls
• 27 girls

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.3

What is the ratio of red apples to green apples

• 7 apples to 3 green
• 4 red apples to 7 apples
• 4 red apples to 3 green apples
• 3 green apples to 4 red apples

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

What is a Ratio?

• Is a comparison of two quantities 
• A rate with a denominator of one
• It is when the only factor the numerator and denominator share is a one 
• Two decimals that can be multiplied

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Do the ratios form a proportion?

• Yes, they form a proportion.
• No, they do not form a proportion.

Tags

CCSS.6.RP.A.3A

One bag of carrots costs $3. How many bags of carrots can you buy for $18?

• 10
• 12
• 6

Tags

CCSS.4.MD.A.2