Dividing Numbers in Scientific Notation: A 6th Grade Quiz

A scientist measures the mass of a small asteroid as 3.2 x 10^12 kg. If the asteroid is divided into 4 equal parts, what is the mass of each part in scientific notation?

• 8.0 x 10^11 kg

• 1.6 x 10^12 kg

• 6.4 x 10^11 kg

• 4.0 x 10^11 kg

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A bacteria culture grows to 1.5 x 10^9 cells. If the culture is split into 3 equal samples, how many cells are in each sample in scientific notation?

• 6.0 x 10^8

• 5.0 x 10^8

• 1.0 x 10^9

• 4.0 x 10^8

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CCSS.8.EE.A.4

A comet travels at a speed of 2.4 x 10^5 km/h. If it travels for 3 hours, how far does it travel in scientific notation?

• 6.0 x 10^5 km

• 8.4 x 10^5 km

• 7.2 x 10^5 km

• 5.4 x 10^5 km

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CCSS.8.EE.A.4

An engineer is designing a microchip that has a width of 5.0 x 10^-6 meters. If the chip is divided into 10 equal sections, what is the width of each section in scientific notation?

• 5.0 x 10^-7 meters

• 5.0 x 10^-5 meters

• 5.0 x 10^-8 meters

• 5.0 x 10^-6.5 meters

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A factory produces 6.0 x 10^4 widgets in a day. If the production is divided equally over 5 days, how many widgets are produced each day in scientific notation?

• 1.2 x 10^4

• 3.0 x 10^4

• 1.0 x 10^4

• 2.4 x 10^4

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A researcher finds that a certain chemical is present in 8.0 x 10^-3 grams in a solution. If the solution is divided into 4 equal parts, how much chemical is in each part in scientific notation?

• 4.0 x 10^-3 grams

• 2.5 x 10^-3 grams

• 2.0 x 10^-3 grams

• 1.0 x 10^-3 grams

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A planet is located 4.5 x 10^11 meters from the sun. If this distance is divided by 3, what is the new distance in scientific notation?

• 2.0 x 10^11 meters

• 4.5 x 10^10 meters

• 1.5 x 10^11 meters

• 1.0 x 10^12 meters

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A library has 2.0 x 10^6 books. If the books are divided equally among 8 shelves, how many books are on each shelf in scientific notation?

• 1.0 x 10^6

• 2.0 x 10^4

• 3.0 x 10^5

• 2.5 x 10^5

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A car can travel 1.2 x 10^3 kilometers on a full tank of gas. If the distance is divided into 4 trips, how far can the car travel on each trip in scientific notation?

• 1.0 x 10^3 kilometers

• 3.0 x 10^2 kilometers

• 4.0 x 10^2 kilometers

• 2.5 x 10^2 kilometers

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A computer processes 5.0 x 10^8 instructions per second. If the processing is divided over 10 seconds, how many instructions are processed each second in scientific notation?

• 5.0 x 10^6

• 5.0 x 10^8

• 5.0 x 10^7

• 5.0 x 10^9

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CCSS.8.EE.A.4