Convert units with ratios

Answer Key - Grade 6 Math Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   A leaky circle in Ari's kitchen drips 250 milliliters each minute (drip, drip, drip). How many liters drip out in 1 hour?

   15
2. 2.

   Sand trickles from a hole in Bo's bucket at 5 grams each second. How many kilograms of sand trickle out in 1 hour?

   18
3. 3.

   Esme's toy drone flies 50 meters each minute. How many kilometers would it fly in 1 hour at that speed?

   3
4. 4.

   Kira's sink fills at 3 liters each minute. A bucket circle fills at 40 milliliters each second. Which circle is faster?

   • The sink, because 3 liters each minute is 50 milliliters each second, 10 more.
   • The bucket tap, because 40 is greater than 3 when you compare the two flow numbers.
   • The bucket tap, because 3 liters each minute works out to 5 milliliters each second.
   • The sink, because 3 liters is 3,000 milliliters, which is far more than 40 milliliters.
5. 5.

   Luz compares two cookie packers. Machine A packs 12 kilograms each hour. Machine B packs 150 grams each minute. Which is faster?

   • Machine B, because 150 is greater than 12 when you compare the two packing speeds.
   • Machine A, because 12 kilograms each hour is 200 grams each minute, 50 more.
   • Machine A, because 12 kilograms is 12,000 grams, which is far more than 150 grams.
   • Machine B, because 12 kilograms each hour works out to 20 grams each minute.
6. 6.

   Milo changes 3.5 liters to milliliters and writes 350 milliliters. What went wrong?

   • The number should stay 3.5 and the unit alone should change, giving 3.5 milliliters.
   • The number should be divided by 1,000, because milliliters are the bigger unit of the two.
   • The work used 100 milliliters for a liter, but a liter is 1,000, so it is 3,500.
   • Nothing went wrong, because a smaller unit needs a smaller number than the 3.5 liters.
7. 7.

   Noah says 2.5 hours is 250 minutes, because 100 is an easy number to use. What is the mistake?

   • The work used 100 minutes for an hour, but an hour is 60 minutes, so it is 150.
   • The number should stay 2.5, since the unit alone changes, giving 2.5 minutes.
   • The number should be divided: 2.5 divided by 60, because minutes are the bigger unit.
   • The number should be multiplied by 90, because 1 hour is 90 minutes, giving 225 minutes.
8. 8.

   Ren's walk to the library takes 2 hours. The bus trip takes 20 minutes. How many times as long as the bus trip is the walk?

   6
9. 9.

   A movie that Tala watches lasts 3 hours. A short cartoon lasts 15 minutes. How many times as long as the cartoon is the movie?

   12
10. 10.

    Zee bakes a cake for 4 hours at low heat. Cupcakes bake in 80 minutes. How many times as long as the cupcakes does the cake bake?

    3