a, 5 . ( - 4 ) . 2 . ( - 36 ) . ( - 25 )
= [ 5 . ( - 4 ) ] . [ 2 . ( - 25 ) ] . ( - 36 )
= - 20 . ( - 50 ) . ( - 36 )
= - 36000
b, 35 . 18 - 35 . 18
= 18 . ( 35 - 35 )
= 18 . 0
= 0
c, 45 - 5 . ( 12 + 9 )
= 5 . 9 - 5 . 21
= 5 . ( 9 - 21 )
= 5 . ( - 12 )
= - 60
d, 24 . ( 16 - 5 ) - 16 . ( 24 - 5 )
= 24 . 16 - 24 . 5 - 16 . 24 - 16 . 5
= 24 . ( 16 - 5 - 16 ) - 16 . 5
= 24 . ( - 5 ) - 16 . 5
= - 24 . 5 - 16 . 5
= 5 . ( - 24 - 16 )
= 5 . ( - 40 )
= - 200
e, 31 . ( - 18 ) + 31 . ( - 81 ) + 31
= 31 . [ - 18 + ( - 81 ) + 1 ]
= 31 . ( - 98 )
= - 3038
g, ( - 12 ) . 47 + ( - 12 ) . 52 + ( - 12 )
= ( -12 ) . ( 47 + 52 + 1 )
= ( - 12 ) . 100
= - 1200
HỌC TỐT NHÉ BẠN !!!!
