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Grade 9 · Math · Algebra 1

9th grade Convert rates and units in several steps worksheet

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Convert rates and units in several steps

Grade 9 Math Worksheet - Challenge Me

NameDate

Circle the best answer.

  1. One gallon of paint covers 350 square feet. Ren paints a wall of 14 square yards (1 yd = 3 ft). How many gallons are needed?

    • 1.08 gallons
    • 0.36 gallons
    • 0.12 gallons
    • 0.04 gallons
  2. A bag holds 1.5 cubic feet of soil. Bo's garden bed needs 3 cubic yards (1 yd = 3 ft). How many bags are needed?

    • 54 bags
    • 6 bags
    • 2 bags
    • 18 bags
  3. A car goes 28 miles per gallon and drives at 56 miles per hour. Gas costs $3.50 per gallon. Milo finds the cost per hour. What is it?

    • $0.57 per hour
    • 2 gallons per hour
    • $7.00 per hour
    • $1.75 per hour
  4. A printer prints 20 pages per minute. A ream of 500 sheets costs $4.50. Esme finds the paper cost per hour of printing. What is it?

    • $1.88 per hour
    • 2.4 reams per hour
    • $0.53 per hour
    • $10.80 per hour
  5. Water costs $2.40 per 1,000 liters. A shower uses 9 liters per minute. Pia finds the cost of a 15-minute shower, to the nearest cent. What is it?

    • $17.78
    • 135 liters
    • $0.06
    • $0.32
  6. A freight elevator carries at most 1,500 pounds. Each crate weighs 14 kilograms (1 kg = 2.2 lb). Zee asks: what is the most crates it can carry?

    • 235 crates
    • 48 crates
    • 49 crates
    • 107 crates
  7. A shelf holds at most 80 kilograms. Each box weighs 6.4 pounds (1 kg = 2.2 lb). Noah asks: what is the most boxes it can hold?

    • 27 boxes
    • 28 boxes
    • 5 boxes
    • 12 boxes
  8. Jun hears a claim: 60 km/h is faster than 40 mph (1 mile = 1.6 km). Which verdict is correct?

    • Yes: 60 is greater than 40, so 60 km/h is faster.
    • No: 40 mph is 64 km/h, so 40 mph is faster.
    • Yes: 40 mph is just 25 km/h, so 60 km/h is faster.
    • Neither: km/h and mph are different units, so they cannot be compared.
  9. Tala hears a claim: 12 feet per second is about 8 miles per hour (5,280 feet in a mile). Which verdict is correct?

    • Neither: ft/s and mph are different units, so they cannot be compared.
    • No: 12 × 5,280 ÷ 3,600 is 17.6 mph, far from 8.
    • No: 12 is not 8, so the claim is wrong.
    • Yes: 12 × 3,600 ÷ 5,280 is about 8.2 mph, close to 8.
  10. Store A sells 400 g for $2.40. Store B sells 1 kg for $5.40. Milo hears a claim: A is cheaper because 2.40 is less than 5.40. Which verdict is correct?

    • Yes: A costs $0.96 per kg, less than B's $5.40 per kg.
    • Neither: grams and kilograms are different units, so prices cannot be compared.
    • Yes: $2.40 is less than $5.40, so A is cheaper.
    • No: A costs $6.00 per kg, more than B's $5.40 per kg.
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9th grade Convert rates and units in several steps worksheet – printable
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About this worksheet

Convert rates and units in several steps. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can write an equation from a rate and a starting amount, changing the rate to the unit of my variable.
  • I can rewrite a linear model in a new unit and tell that the rate changes but the fixed fee does not.
  • I can compare two rates given as a table and as an equation, and tell when one plan becomes cheaper.
  • I can change square and cubic units, chain three rates, and judge a claim by converting both sides.

Standard: N-Q.A.1

Words to know

conversion fact: A pair that names the same amount two ways: 1 foot = 12 inches.

rate: A comparison of two different units, like $6 for each yard.

rate of change: How much the output changes for each one step of the input: the number beside the letter.

starting amount: The value when the input is 0: the number added or subtracted.

square unit: A unit for area: a square yard is a square 3 feet long and 3 feet wide.

break-even: The point where two plans cost the same.

Common mistakes

Your child used the number as given without changing its unit.

Your child multiplied where the conversion needs dividing, or the reverse.

Your child found the rate but left out the amount at the start.

What to say

Ask: does the rate say per hour while the variable counts minutes?

Ask: is the new unit bigger or smaller, so should the number get smaller or bigger?

Ask: what is the value when the time is zero?

Questions parents ask

What is the most common mistake with convert rates and units in several steps?

Your child used the number as given without changing its unit.

How can I help my child with convert rates and units in several steps?

Ask: does the rate say per hour while the variable counts minutes?

Are these 9th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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