a) 50-2016+50-118+2016-18 b) 173-536+173-[29-29+526] c) -[-171+171+223]-[172-105+172]+223

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1. Lời giải:

   a, 50- 2016+ 50- 118+2016- 18

   = (50 + 50) + (-2016 + 2016) + (-118 – 18)

   = 100 + (-136)

   = -36

   c, 173-536+173-[29-29+526]

   = 173- 536 +173- 526

   = (173 + 173) – 536 – 526

   = 346 – 536 – 526

   = -716

   c, -[-171+171+223]-[172-105+172]+223

   =

   171-171-223-172+105-172+223

    =(171-171)+(223-223)+(-172-172)+105

    =0+0+(-344)+105

    =-239

   @Rapbokhongthuocloi

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2. Đáp án:+Giải thích các bước giải:

   `a) 50-2016+50-118+2016-18`
   `=50+50-2016+2016-118-18`
   `=(50+50)-(2016-2016)-(118+18)`
   `=100-0-136`
   `=100-136`
   `=-36`
   `b) 173-536+173-(29-29+526)`
   `=173-536+173-29+29-526`
   `=173+173-536-526-29+29`
   `=(173+173)-(536+526)-(29-29)`
   `=346-1062-0`
   `=-716-0`
   `=-716`
   `c) -(-171+171+223)-(172-105+172)+223`
   `=171-171-223-172+105-172+223`
   `=171-171-223+223-172-172+105`
   `=(171-171)-(223-223)-(172+172)+105`
   `=0-0-344+105`
   `=-344+105`
   `=-239`

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