Tính nhanh:

a, 35x18 -5.7x28 = 35x18 -35x28 = 35 x (18 – 28) = 35 x ( -10) = -350

b,24x(16-5)-16x(24-5) = 24x16 – 24 x 5- 16x24 + 16x5 = (– 24 + 16)x 5 = -8 x 5 = -40

d,31x(-18)+31x(-81)-31 = 31x (-18  -81 – 1) =  31 x (-100) = -3100

e,(-12)x47+(-12)x52+(-12) = (-12)x (47+52 + 1)= (-12)x 100= - 1200

Ý c chưa rõ đề bài...

\(a.35\times18-5.7\times28\)

\(=35.18-35.28\)

\(=35.\left(18-28\right)\)

\(=35.\left(-10\right)\)

\(=-350\)

\(b.24.\left(16-5\right)-16.\left(24-5\right)\)

\(=24.16-24.5-16.24-16.5\)

\(=\left(24.16-16.24\right)-24.5-16.5\)

\(=0-\left(24+16\right).5\)

\(=0-40.5\)

\(=0-200\)

\(=-200\)

Ôi sr bn, câu b tớ nhầm dấu

24 . ( 16 - 5 ) - 16 . ( 24 - 5 )

= 24 . 16 - 24 . 5 - 16 . 24 - 16 . 5

= -24 . 5 - 16 . 5

= -40 . 5

= -200

24 . ( 16 - 5 ) - 16 . ( 24 - 5 )

= 24 . 16 - 24 . 5 - 16 . 24 - 16 . 5

= 24 . ( 16 - 5 ) - 16 . ( 24 - 5 )

= 24 . 11 - 16 . 21

= ( 24 - 16 ) . ( 11 - 21 )

= 8 . - 10

= - 80

24 . ( 16 - 5 ) - 16 . ( 24 - 5 )

= 24 . 16 - 24 . 5 - 16 . 24 + 16 .5

= 24 . ( 16 - 16) - 5 ( 24 -16 )

= 24 .      0       -  5 .   8

=     0              -      40

=         - 40

mình ko phải lớp 6

24.(16-5)-16.(24-5)

= 24 . 16 - 24 . 5 - 16 . 24 + 5. 16

= 5 . 16 - 24 . 5

= 5. ( 16 - 24 )

= 5 . ( - 8)

= - 40

Lê Thị Thanh Xuân k giups đc thì đừng lm v nhé

24 . ( 16 - 5 ) - 16 . ( 24 - 5 ) 

=24.16-24.5-16.24+16.5

=-24.5+16.5

=5(-24+16)

=5.(-8)

=-40

Chúc bạn học tốt !

Tải PHOTOMATH bạn nhé

a) 24.(16-5)+16.(24-5)

=24.16-24.5+16.24-16.5

=32.24-40.5

=...................

31.(-81)+31.(-81)-31

=31[(-81)-81-1]

=31.(-163)

=...........................

\(a.24.64+36.24-100.24\)

\(=24.\left(64+36-100\right)\)

\(=24.0\)

\(=0\)

\(b.5.4^2-16:2^2\)

\(=5.16-16:4\)

\(=80-4\)

\(=76\)

Hok tốt

a, 24.64+36.24-100.24

=24.(64+36-1000

=24.0

=0

b, 5.4^2-16:2^2

=80-4

=76

a, 24 . 64 + 36 . 24 - 100 . 24

= 24 . ( 64 + 36 ) - 100

= 24 . ( 100 - 100 )

= 24 . 0

= 0

  24.(16-5)-16.(24-6)

=24.16-24.5-16.24-6.16

=24.(16-5-16)-6.16

=24.(-5)-6.16

=-120-96

=-216

Trl

-Bạn kia  làm đúng r nhé !~ :>

Học tốt 

nhé bạn ~

Bài làm

24 . ( 16 - 5 ) - 16( 24 - 6 )

= 24 . 16 - 24 . 5 - 16 . 24 + 16 . 6

= ( 24 . 16 - 16 . 24 ) - ( 24 . 5 + 16 . 6 )

= 0 - [ 6( 4.5 + 16 ) ]

= 0 - (  120 + 96 )

= 0 - 216

= - 216

Câu 1 :

a) 25 - (-75) + 32 - (32 + 75)

= 25 + 75  + 32 - 32 - 75

= 25 + (75 - 75) + (32 - 32)

= 25 + 0 + 0

= 25

b) |-127| - 18 . (5  - 6)

= 127 - 18 . (-1)

= 127 + 18

= 145

c) 24.(16 - 5) - 16.(24 - 5)

= 24.11 - 16.19

= 16.16,5 - 16.19

= 16.(16,5 - 19)

= 16.(-2,5)

= -40

ủng hộ tớ nha

kb nha

a)25-(-75)+32-(32+75)=25-(-75)+32-107=25

b)l-127l-18.(5-6)=127-18.(-1)=127-(-18)=145

c)24.(16-5)-16.(24-15)=24.11-16.9=264-144=120

\(a,25-\left(-75\right)+32-\left(32+75\right)\)

\(=25+75+32-32-75\)

\(=25+\left(75-75\right)+\left(32-32\right)\)

\(=25+0+0\)

\(=25\)

\(b,\left|-127\right|-18.\left(5-6\right)\)

\(=127-18.\left(-1\right)\)

\(=127+18\)

\(=145\)

\(c,24.\left(16-5\right)-16.\left(24-5\right)\)

\(=24.16-24.5-16.24+16.5\)

\(=\left(24.16-16.24\right)-\left(24.5-16.5\right)\)

\(=24.\left(16-16\right)-5.\left(24-16\right)\)

\(=24.0-5.8\)

\(=0-40\)

\(=-40\)

24.(16-5)-16.(24-5)

=24.11-16.19

=264-304

=-40

happy new year

24 x ( 16 -5 ) - 16 x ( 24 - 5 )

= 24 x 11 - 16 x 21

= 264 - 336

= -72.

24.(16-5)-16.(24-5) = -72