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*A * b = - ab - (a + b) for (- 3) * 5 (- 4) * - 5 Use it quickly
(-3)*5=-(-3)×5-(-3+5)=15-2=-13
(-4)*(-5)=-(-4)×(-5)-[(-4)+(-5)]=-20-(-9)=-11
RELATED INFORMATIONS
- 1. "A" denotes a new operation. Its meaning is: a B = (- a) · B - (a + b). Find (3 a 4) a 5
- 2. A new operation is defined, which requires a * b = (a + b) + [a + (- b)] to find the value of 3 * (- 5)
- 3. "*" represents a new operation, its meaning is a * b = - A * B - (a + b). Find: (1) 3 * 5; (2) (- 3) * - 5
- 4. 8 * 1 / 4 and 1 / 4 * 8 are calculated in the same way and have the same meaning
- 5. 4 / 3 times 4 and 4 times 3 / 4 have different meanings, but the calculation method is the same (right or wrong)
- 6. -8-3 + 3 + 1-7, read according to the meaning of sum: () read according to the meaning of operation: ()
- 7. How many bases are there for statistics 1-100
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- 9. For a car with a mass of 2T, when driving on a straight road, the resistance is always 0.2 times of the gravity. After driving at a constant speed for 2km, the engine is turned off, and then it stops after driving for 55m. It is necessary to explain the work (g = 10N / kg) of the traction force on the car in the whole process
- 10. A physics problem about speed calculation When an earthquake occurs, the vibration of the source propagates outward in the form of S-wave and P-wave. The propagation speed of the two waves in the crust is not the same, about 3.4 km / s and 5.6 km / s respectively. The place directly above the source becomes the epicenter. The first one to reach the ground is the P-wave. At this time, people in the epicenter will feel up and down turbulence, and then the S-wave will come, and they will feel left and right sway, If the time difference between P-wave and S-wave arriving at the epicenter is 2 seconds, how many kilometers is the distance from the source to the epicenter?
- 11. "*" represents a new operation, its meaning is a * b = - A * B - (a + b), then what is the result of (- 3) * - 5
- 12. From the beginning, what is the number of the thousandth four
- 13. What do the numbers on the bottom of a plastic bottle mean?
- 14. What does the number 7 in the triangle at the bottom of a plastic bottle mean? Is it safe?
- 15. What do the numbers 1 to 7 at the bottom of a plastic bottle mean
- 16. What do the numbers "1-7" on the bottom of plastic bottles represent? What are the notes about these signs?
- 17. What does the number 7 stand for and what does it mean?
- 18. What do the numbers 9, 7 and 3 mean in life or culture?
- 19. What does the number seven stand for? Good side
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