27(16-13)-16(27-13)
=27.16-27.13-16.27+16.13
=(27.16-16.27)+(-27.13+16.13)
=0+13(-27+16)
=0+13.-11
=0+-143=-143
Trả lời :
27 .( 16 - 13 ) - 16 . ( 27 - 13 )
= 27 . 16 - 27 . 13 - 16 . 27 + 16 . 13
= ( 27 . 16 - 16 . 27 ) + 16 . 13 - 27 .13
= 0 + 13 . ( 16 - 27 )
= 13 . ( - 11 )
= - 143
- Study well -