![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
128.(278-302)+278.(302-128)
=128.278-128.302+278.302-278.128
=128.278-278.128-128.302+278.302
=302.(128+278)
=302.406
=122612
Chúc bn học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) 128 . ( 278 - 302 ) + 278 . ( 302 - 128 )
= 128 . 278 - 128 . 302 + 278 . 302 - 128 . 278
= ( 128 . 278 - 128 . 278 ) + ( 278 . 302 - 128 . 302 )
= 302 . ( 278 - 128 )
= 302 . 100 = 30200 .
b ) 2 . ( - 7 )2 - 3 . ( - 4 )3 - 60
= 2 . 49 + 192 - 60
= 98 + 192 - 60
= 230 .
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1:
a) \(128\cdot\left(278-302\right)+278\cdot\left(302-142\right)\)
\(=128\cdot278-128\cdot302+278\cdot302-278\cdot142\)
\(=41408\)
b) \(\left(-2\right)\cdot\left(-6\right)^2+3\cdot\left(-2\right)^3-62\)
\(=\left(-2\right)-36-24-62=-2-36-24-62=-124\)
c) \(1152-\left(374+1152\right)+\left(-65+374\right)\)
\(=1152-374-1152-65+374=-65\)
d) \(-215\cdot54-430\cdot23=-215\cdot54-215\cdot46=-215\left(54+46\right)=-215\cdot100=-21500\)
e) \(\left(-2\right)+\left(-49\right)+\left(-18\right)+49=-20\)
![](https://rs.olm.vn/images/avt/0.png?1311)
512 x ( 2 - 128 ) - 128 x ( -512 )
= 512 x ( -126 ) - ( -128 ) x 512
= 512 x [ ( -126 ) - ( -128 ) ]
= 512 x 2
= 1024
512 × (2 - 128) - 128 × (-512)
= 512 × (-126) - (-128) × 512
= 512 × [(-126) - (-128)]
= 512 × 2
= 1024
![](https://rs.olm.vn/images/avt/0.png?1311)
512.(2-128)-128.(-512)
= [512.(2-128)]-[128.(-512)
= - 64512 - (- 65536)
= - 64512 + 65536
= 1024
\(512.(2-128)-128.(-512)\)
\([512.(2-128)]-[128.(-512)]\)
\(-64512-(-65536)\)
\(-64512+65536\)
\(1024\)
![](https://rs.olm.vn/images/avt/0.png?1311)
128.278 - 302 + 278.302 - 128
= 128.(278 - 1) + 302.(278 - 1)
= 128.277 + 302.277
= 277.(128 + 302)
= 277.430
= 119110