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34 tons, 25 tons______ Tons; 13 of 56 hours is______ Hours
(1) 34 × 25 = 310 (tons); (2) 56 × 13 = 518 (hours)
RELATED INFORMATIONS
- 1. 36 billion in scientific notation______ ．
- 2. 12.5 mg = ton expressed in scientific notation
- 3. Biologists found that the length of a virus is 0.0000403 mm, which is expressed by scientific counting method as_______ The significant number is________ . 0.008905: (1) 001 cm; (2) 0001 cm; (3) Accurate to 0.00001cm
- 4. A biologist found that the length of a virus is about 0.000044 mm. How many nanometers is the length of this virus
- 5. 0.07 nm is represented by scientific counting method
- 6. -What is 37050.123 in scientific notation
- 7. The approximate number 7 995 123 retains three significant numbers
- 8. What are the rules of 2.8,4,5.6,8,11,16,22
- 9. 2, 7, 22, 67______ 、______ ．
- 10. 134670000 can be expressed as (3 significant digits reserved) by scientific notation
- 11. 2 hours 6 minutes 12 seconds = () seconds
- 12. How many hours are 36 days? How many minutes? How many seconds?
- 13. Experience the application of scientific counting method and approximate number in practice, and talk about the function of scientific counting method and approximate number
- 14. 158.345 billion yuan. This data is expressed by scientific notation, which is about [accurate to one billion bits]
- 15. In scientific notation, the following numbers are 235 000 188 520 000 701 000 000 000 - 38 000 000 000
- 16. 116 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000?
- 17. -8 000 to scientific counting
- 18. Use the method of rounding, take the approximate value of each number according to the requirements, and use the scientific counting method to express 12 200 000 000 (keep 2 significant figures) 361059000 (keep three significant figures) 11669.4 billion (keep 4 significant figures) 9500 (accurate to 100 million bits) 42 million (to the nearest million)
- 19. For a batch of finished products, 100 pieces are selected according to the repeated sampling method, and 4 pieces are rejected. When the probability is 95.45%, whether the rejection rate does not exceed 6%
- 20. 1.2km/min = m / s or km / h