Quiz Review- Ratios, Rates and Better Buy

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

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

Simplify the ratio of
35 : 14

• 5 : 2
• 2 : 5
• 3 : 1
• 35: 14

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Our Science class has 15 boys and 20 girls. What is the boy:girl ratio in simplest form?

• 4 to 5

• 10 to 13

• 3:4

• 3:5

You can buy 36 cookies for $4 for all of your classmates in Math! What is the unit rate (in cookies per dollar)?

• 4 cookies per dollar

• 6 cookies per dollar

• 9 cookies per dollar

• 1/9 dollars per cookie

You spend $40 on 5 pounds of Starbucks coffee. What is the unit rate in dollars per pound?

• $8 per pound

• $5 per pound

• $35 per pound

• 0.125 pounds per dollar

Nurse Bridget sees 120 students in 8 hours. What is the unit rate (in students per hour)?

• 16 students per hour

• 15 students per hour

• 12 students per hour

• 20 students per hour

Haleigh can type 675 words in 9 minutes. How many words can she type per minute?

• 75 words per minute

• 6075 words per minute

• 86 words per minute

• 65 minutes per word

Which is the better buy? (Remember what goes on TOP of the rate!!)

• A

• B

Find the best unit rate. Ms. Messier got 12.5 gallons of gas and spent $30.38.

• $2.43 per gallon

• $0.41 per gallon

• 2.43 gallons per dollar

• 0.41 gallons per dollar