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
\(435+\left(-43\right)+\left(-487\right)+\left(-57\right)+383+\left(-415\right)=-184\)
\(1316+317+\left(-1213\right)+\left(-314+\left(-85\right)\right)=21\)
\(1+\left(-4\right)+7+\left(-10\right)+13+\left(-16\right)=-9\)