6. Ratios and Rates

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

Rebeca and Leila each added the same amount of water to their aquariums. Rebeca mixed 3 mL of chemical solution for every gallon of water for her aquarium. Leila mixed 8mL of chemical solution for every 2 gallons of water for her aquarium.

Which of these statements is true?

• Rebeca used more solution per gallon of water than Leila, because 3:1 is greater than 8:2.

• Leila used more solution per gallon of water than Rebeca, because 8mL is greater than 3 mL.

• Rebeca used more solution per gallon of water than Leila, because 3 mL is greater than 2 mL.

• Leila used more solution per gallon of water than Rebeca, because 8:2 is greater than 3:1.

Tags

CCSS.6.RP.A.3A

The table above shows the time Angela worked and the amount of money she earned during four different weeks. Based on the information in the table, how much will Angela earn if she works 40 hours in a week?

• $380

• $341. 75

• $390

• $390.25

Tags

CCSS.5.OA.B.3

What is a rate?

• the comparison of units

• the comparison of same units

• the comparison of ratios

• the comparison of different units

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

For each pair of pants in Mike’s closet he has 6 shirts. Which statement is true about the ratio of pairs of pants to shirts in Mike’s closet?

• Mike has 5 more shirts than pairs of pants.

• Mike has 6 times as many shirts than pairs of pants.

• Mike has 6 more shirts than pairs of pants.

• Mike has 7 times as many shirts than pairs of pants.

David drove 100 miles and used eight gallons of gasoline. Rebecca drove 75 miles and used six gallons of gasoline. David said that they used gasoline at the same rate. Is he correct?

• No, because the mileage per gallon of gas is not equivalent.

• Yes, because even though they drove different distances, the amount of gas used balanced out the difference.

• No, because they drove different distances.

• Yes, because the mileage per gallon of gas is equivalent.

A grading machine can grade 48 multiple-choice tests in 1 minute. How long will it take the machine to grade 300 tests?

• 6.25 Min
• 0.16 Tests
• 6.25 Tests
• 0.16 Min

Tags

CCSS.6.RP.A.3B

John traveled 567 miles in 9 hours. Write the unit rate.

• 62 mph
• 60 mph
• 61 mph
• 63 mph

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Brittney bought 13 peaches for $8.84. How much was each peach?

• .68 cent
• .71 cent
• .65 cent
• .74 cent

Tags

CCSS.6.NS.B.3

Solve the proportion:

• 4
• 8
• 14
• 10

Tags

CCSS.7.RP.A.2B