Question

516+320+357+5000+612-(516-320)-(5000+357+612)+(-420)+(-580516+320+357+5000+612-(516-320)-(5000+357+612)+(-420)+(-580)

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Answer 1

Theo quy tắc của dấu ngoặc,ta có:

516+320+357+5000+612-(516+320)-(5000+357+612)+(-420)+(-580)

= 516+320+357+5000+612-516-320-5000-357-612+(-420)+(-580)

= (516-516)+(320-320)+(357-357)+(5000-5000)+(612-612)+(-420)+(-580)

= 0 + 0 + 0 + 0 + 0 + (-420)+(-580)

= 0 + 0 + 0 + 0 + (-420)+(-580)

= 0 + 0 + 0 + (-420)+(-580)

= 0 + 0 + (-420)+(-580)

= 0 + ((-420)+(-580))

= 0 + -1000

= -1000