Question

2 ) Thực hiện phép tính :

a ) ( 26 - 6 ) . ( - 4 ) + 31 . ( - 7 - 13 )
b, - 18 ( 55 - 24 ) - 28 ( 44 - 68 )

Làm đúng tick 

Answer 1

a, = 20 .(-4) + 31 . (-20)

= -80 - 620 = -700

b, = -18 . 31 - 28 .(-24)

= -558 + 672 = 114

Answer 2

a )

= 20 x (-4) + 31 x ( -20 )

= ( -20 ) x 4 + 31 x ( - 20 )

= ( - 20 ) x ( 4 + 31 )

= ( - 20 0 x 35 

= -700

b)

=-18 x 31 - 28 x -24

=-558 - -672

=(-558) +( 672)

= 114

Answer 3

-700;114

Answer 4

giup toi voi

Answer 5

a, ( 26 - 6 ) . ( -4 ) + 31 . ( -7 - 13 )

= 20 . ( -4 ) + 31 . ( -20 )

= -80 - 620 = -700

#hoc_tot#

Answer 6

a) (26-6) . (-4) +31-(-7-13)

=20.(-4)+31.(-20)

=-80-620

=-700

b)-18.(55-24)-28.(44-68)

=-18.31-28.(-24)

=-558+672

=114