-(-345 + 56 - 267) + ( 453 - 124 - 843)

= - (-289 - 267) + (329 - 843)

= 556  - 514

= 42

256,23 + 12,56 = 268,79

56,23 + 12,45 = 68,68

89,67 - 23,45 = 66,22

1,23 + 34,67 = 35,9

19,56 + 45,65 = 65,21

kp voi : http://olm/thanhvien/gop123 va mih dj

\(\left|-19\right|+\left(-29\right)+\left(-43\right)+\left|71\right|\)

\(=19+\left(-29\right)+\left(-43\right)+71\)

\(=\left(-10\right)+\left(-43\right)+71\)

\(=\left(-53\right)+71\)

\(=18\)

\(\left|-33\right|+\left(-73\right)+\left(-41\right)+\left|22\right|\)

\(=33+\left(-73\right)+\left(-41\right)+22\)

\(=\left(-40\right)+\left(-41\right)+22\)

\(=\left(-81\right)+22\)

\(=-59\)

\(\left|-25\right|+\left(-75\right)+\left(-17\right)+\left|99\right|\)

\(=25+\left(-75\right)+\left(-17\right)+99\)

\(=\left(-50\right)+\left(-17\right)+99\)

\(=\left(-67\right)+99\)

\(=32\)

\(\left|-22\right|+\left(-92\right)+\left(-56\right)+22\)

\(=22+\left(-92\right)+\left(-56\right)+22\)

\(=\left(-70\right)+\left(-56\right)+22\)

\(=\left(-126\right)+22\)

\(=-104\)

Phần dưới bạn làm nốt nhé!

1: Ta có: \(2155-\left(174+2155\right)+\left(-68+174\right)\)

\(=2155-174-2155-68+174\)

=-68

2) Ta có: \(-25\cdot72+25\cdot21-49\cdot25\)

\(=-25\cdot\left(72-21+49\right)\)

\(=-25\cdot100=-2500\)

a) \(33\times4+5\times33+33\times3+33-99=33\times4+5\times33+33\times3+33\times1-33\times3\)

\(=33\times\left(4+5+3+1-3\right)=33\times10=330\)

b) \(256+347+453-147-56-253=\left(256-56\right)+\left(347-147\right)+\left(453-253\right)\)

\(=200+200+200=600\)

a/=256x(82+18)

=256x100

=25600

b/211x(56+43+1)

=211x100=21100

300

300

= 300