Grade 8 Mathematics | Independent Practice
1. 45,000,000
_______ x 10^_______
2. 0.000023
_______ x 10^_______
3. 6,700,000,000
_______ x 10^_______
4. 0.00000091
_______ x 10^_______
5. 328,000
_______ x 10^_______
6. 0.0052
_______ x 10^_______
7. 3.8 x 10^5
_______________________
8. 7.2 x 10^-4
_______________________
9. 9.05 x 10^7
_______________________
10. 4.6 x 10^-6
_______________________
11. (4 x 10^5) x (2 x 10^3)
Answer: _______ x 10^_______
12. (9 x 10^8) / (3 x 10^4)
Answer: _______ x 10^_______
13. (5 x 10^3) x (6 x 10^4)
Answer: _______ x 10^_______
14. (8.4 x 10^9) / (2.1 x 10^3)
Answer: _______ x 10^_______
| Number 1 | Number 2 | |
|---|---|---|
| 15. 5.2 x 10^6 | ______ | 3.8 x 10^7 |
| 16. 9.1 x 10^-4 | ______ | 8.5 x 10^-4 |
| 17. 7.3 x 10^5 | ______ | 7.3 x 10^4 |
| 18. 2.5 x 10^-3 | ______ | 4.1 x 10^-5 |
19. The distance from Earth to the Sun is approximately 93,000,000 miles. Write this distance in scientific notation.
Answer: _______________________
20. A red blood cell has a diameter of about 0.000007 meters. Write this in scientific notation.
Answer: _______________________
21. Light travels at 3 x 10^8 meters per second. How far does light travel in 5 x 10^2 seconds?
Answer: _______________________
22. A computer can perform 8.4 x 10^12 calculations per second. How many calculations can it perform in 2 x 10^3 seconds?
Answer: _______________________
23. The mass of Earth is about 5.97 x 10^24 kg. The mass of the Moon is about 7.35 x 10^22 kg. How many times greater is Earth's mass than the Moon's mass?
Answer: _______________________
24. A bacteria cell divides every 20 minutes. If you start with 1 cell (1 x 10^0), how many cells will there be after 6 hours? (Hint: In 6 hours, there are 18 twenty-minute periods, and the number doubles each time, so multiply by 2^18 = 262,144)
Answer: _______________________