Question

Tính nhanh:

(-98) . (1-246) - 246 . 98

Giup mk vs ahuhu

Answer 1

(-98).(1-246)-246.98

=-98.1-(-98).246+246.(-98)

=-98(1-246+246)

=-98.1=-98

Chúc bạn hok tốt !!!

Answer 2

(-98) . (1 - 246) - 246 . 98

= ( - 98 ) . ( - 245 ) - 246 . 98

= ( - 98 ) . ( - 245 ) - ( - 246 ) . ( - 98 )

= ( - 98 ) . [ ( - 245 ) - ( - 246 )  ]

= ( - 98 ) . 1

= - 98

Answer 3

(-98).(1-246)-246.98

=(-1).98.(1-246)-246.98

=98.[(-1).(1-246)-246]

=98.(-1)+246-246)

=98.(-1)

=-98

Answer 4

(-98) . (1-246) - 246 . 98

= 98 . (-1) . (1 - 246) - 246 . 98

= 98 . [(-1) . (1 - 246) - 246]

= 98 . [(-1) + 246 - 246]

= 98 .   (-1)

=    -98