Division in Scientific Notation: 6th Grade Challenges

A scientist measures the mass of a small asteroid as 3.2 x 10^6 kg. If the asteroid is divided into 4 equal parts, what is the mass of each part in scientific notation?

• 4.0 x 10^5 kg

• 1.6 x 10^6 kg

• 6.4 x 10^5 kg

• 8.0 x 10^5 kg

A bacteria culture grows to 1.5 x 10^8 cells. If the culture is split into 5 equal samples, how many cells are in each sample in scientific notation?

• 3.0 x 10^7

• 4.0 x 10^7

• 1.0 x 10^8

• 2.5 x 10^7

A comet travels at a speed of 2.4 x 10^4 km/h. If it travels for 3 hours, how far does it travel in scientific notation?

• 6.0 x 10^4 km

• 7.2 x 10^4 km

• 8.4 x 10^4 km

• 5.4 x 10^4 km

A researcher has 9.0 x 10^3 grams of a chemical. If they need to divide it into 3 equal portions for experiments, how much does each portion weigh in scientific notation?

• 4.5 x 10^3 grams

• 3.0 x 10^3 grams

• 2.0 x 10^3 grams

• 1.0 x 10^3 grams

A galaxy is estimated to contain 5.0 x 10^11 stars. If astronomers can observe 1.0 x 10^10 stars, how many stars remain unobserved in scientific notation?

• 4.0 x 10^11

• 4.9 x 10^11

• 1.0 x 10^11

• 5.0 x 10^10

A computer processes data at a rate of 2.5 x 10^6 bytes per second. How many bytes does it process in 4 seconds in scientific notation?

• 2.0 x 10^7

• 5.0 x 10^6

• 1.5 x 10^7

• 1.0 x 10^7

A large tree can absorb 1.2 x 10^3 liters of water per day. If it is watered for 5 days, how much water does it absorb in scientific notation?

• 7.2 x 10^3

• 1.2 x 10^4

• 5.0 x 10^3

• 6.0 x 10^3

A planet is 3.6 x 10^8 kilometers away from Earth. If a spacecraft travels at a speed of 1.2 x 10^5 kilometers per hour, how long will it take to reach the planet in scientific notation?

• 2.5 x 10^4 hours

• 3.0 x 10^3 hours

• 1.8 x 10^2 hours

• 4.0 x 10^3 hours

A factory produces 7.5 x 10^4 toys in a month. If the production is divided equally over 6 months, how many toys are produced each month in scientific notation?

• 1.25 x 10^4

• 5.0 x 10^4

• 2.5 x 10^4

• 1.5 x 10^4

A library has 2.0 x 10^5 books. If 4.0 x 10^2 books are checked out, how many books remain in the library in scientific notation?

• 1.99 x 10^5

• 1.996 x 10^5

• 1.96 x 10^5

• 2.0 x 10^5