a/ -32 -/ – 25 / + 25 – 50 +12 b/ 181 -46 -18 +18x [ – 65] c/ 17 x [ -19 ] – 19 x 18 + 19×35 d/ 18 -23 + 33 – 18 + 70

Đáp án:

Giải thích các bước giải:

a,

`-32-|-25|+25-50+12`

`=-32-25+25-50+12`

`=(-32+12)+(-25+25)-50`

`=-20+0-50`

`=-70`

b,

`181-46-18+18.(-65)`

`=181-46+18.(-1)+18.(-65)`

`=135+18.(-1-65)`

`=135+18.(-66)`

`=135-1188`

`=-1053`

c,

`17.(-19)-19.18+19.35`

`=(-17).19-19.18+19.35`

`=19.(-17-18+35)`

`=19.0`

`=0`

d, `18-23+33-18+70`

`=(18-18)+(-23+33)+70`

`=0+10+70`

`=80`