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(-57) . (67-34) - 67 . (34-57)
= -57 . 67 - 34 . (-57) - 67 . 34 - 67 . 57
= -34.[(-57)+67]
= -34.10
= -340
(-57) x(67-34)-67x(34-57)
=-57x33-67x(-23)
=-1881-(-1541)
=-1881+1541
=-340
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
(-57).(67-34)-67.(34-57)
=-(57.67)+(57.34)-(67.34)+(67.57)
=-(57.67)+(57.67)+(57.34)-(67.34)
=0+(57.34)-(67.34)
=34.57-34.67
=34.(57-67)
=34.(-10)
=-340
- 57 ) . ( 67 - 34 ) - 67 . ( 34 - 57 )
= ( - 57 ) . 67 - ( - 57 ) . 34 - ( 67 . 34 - 67 . 57 )
= ( - 57 ) . 67 - ( - 57 ) . 34 - 67 . 34 + 67 . 57
= 67 . [ ( - 57 ) + 57 ] - 34 . ( 67 - 57 )
= 67 . 0 - 34 . 10
= 0 - 340
= 340
![](https://rs.olm.vn/images/avt/0.png?1311)
*Cách 1:
(–57) . (67 – 34) – 67 . (34 –57)
= [(–57) . 67 – (–57 ) . 34] – (67 . 34 – 67 . 57)
= – (57 . 67) – [–(57 . 34)] – (67 . 34 – 67 . 57)
= – 57 . 67 + 57 . 34 – 67 . 34 + 67 . 57
= 67 . 57 – 57. 67 + 57 . 34 – 67 . 34
= 0 + 34 . (57 – 67)
= 34 . (–10) = –340
*Cách 2:
(–57) . (67 – 34) – 67 . (34 –57)
= (–57) . 33 – 67 . (-23)
= -1881 + 1541
= -340
![](https://rs.olm.vn/images/avt/0.png?1311)
(-57).(67-34)-67.(34-57)
=(-57).67-(-57).34-67.34-67.57
=67.[(-57)-57] - 34.[-57-67]
=67.[-57+-57]-34.[-57+-67]
=67.-114-34.-124
=-7638-(-4216)
=-7638+4216
=-3422
![](https://rs.olm.vn/images/avt/0.png?1311)
(-57).(67-34) - 67.(34-57)
= -57.67 + 57.34 - 67.34 + 67.57
= (67.57 - 57.67) + 34.(57-67)
= 0 + 34.(-10)
= -340
=-57.67+57.34-67.34+67.57
=-57.67+67.57+57.34-67.34
=0+(57-67).34
=-10.34
=-340