Question

\(435+\left(-43\right)+\left(-487\right)+\left(-57\right)+383+\left(-415\right)\)

\(1316+317+\left(-1213\right)+\left(-314+\left(-85\right)\right)\)

\(1+\left(-4\right)+7+\left(-10\right)+13+\left(-16\right)\)                                            

Answer 1

3 phần hay 1 phần đấy

Answer 2

435 + ( - 43 ) + ( - 487 ) + ( - 57 ) + 383 + ( - 415 )

= 435 + ( - 415 ) + ( - 43 ) + 383 + ( - 487 ) + ( - 57 )

= [ 435 + ( - 415 ) ] + [ ( - 43 ) + 383 ] + [ ( - 487 ) + ( - 57 ) ] 

= 20 + 340 + ( - 544 )

= 360 + ( - 544 )

= - 184

1316 + 317 + ( - 1213 ) + ( - 314 + ( - 85 ) )

= [ 1316 + ( - 1213 ) ] + [ 317 + ( - 314 + ( - 85 ) ) ]

= 103 + ( - 82 )

= 21

1 + ( - 4 ) + 7 + ( - 10 ) + 13 + ( - 16 )   

= [ 1 + ( - 10 ) ] + [ ( - 4 ) + ( - 16 ) ] + [ 7 + 13 ]

= ( - 9 ) + ( - 20 ) + 20

= ( - 9 ) + [ ( - 20 ) + 20 ]

= ( - 9 ) + 0 

= - 9 

Answer 3

\(435+\left(-43\right)+\left(-487\right)+\left(-57\right)+383+\left(-415\right)=-184\)

\(1316+317+\left(-1213\right)+\left(-314+\left(-85\right)\right)=21\)

\(1+\left(-4\right)+7+\left(-10\right)+13+\left(-16\right)=-9\)