Problem Solving About Rate and Unit Rate

What mathematical operation do ratios involve?

• addition

• subtraction

• multiplication

• division

Water flows from a faucet at a rate of 5 gallons every 25 seconds. At this rate, how many gallons will flow from the faucet in 45 seconds?

• 9 gallons

• 5 gallons

• 11 gallons

• 40 gallons

A machine can pack 70 boxes of spaghetti in 5 minutes. At this rate, how many boxes can they pack in 8 minutes.

• 35 boxes

• 14 boxes

• 112 boxes

• 560 boxes

Harry mowed eight lawns and earned $96. How much did he earn for each lawn?

• $96

• $12

• $768

• $8

One snowy day, the snow was falling at a rate of 3 inches per hour.  If it kept snowing at the same rate, now many inches would accumulate in 2½ hours

• 7 ½  inches

• 6 ½ inches

• 5 ½ inches

Which is the "better buy"?  A 12 ounce can of corn for $1.92 of  a 20 ounce can of corn for $3.00?

• They are the same

• The  20 ounce can

• The 12 ounce can

What is the quotient of these fractions in lowest terms?

• 6/40

• 6/10

• 3/5

• 12/20

• a
• b
• c
• d

• a
• b
• c
• d

• a
• b
• c
• d