![](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)
Ta có : (-123) + 77 + (-257) + 23 - 43
= (-123 + 23) + (77 - 257) - 43
= -100 + 180 - 43
= 80 - 43
= 37
\(\left(-123\right)+77+\left(-257\right)+23-43\)
\(=\left(-123\right)+23+\left(-257\right)+77-43\)
\(=\left(-100\right)+\left(-180\right)-43\)
\(=\left(-280\right)-43=-323\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
11 + (- 7) . 12 + (- 48) : (- 4) + 52
= 11 + (- 84) + 12 + 25
= - 73 + 37
= - 36
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
-5/2×(2/11+9/11)×(-5/7+15/7)
-5/2×1×10/7
-5/2×10/7
25/7
![](https://rs.olm.vn/images/avt/0.png?1311)
=(-259+259)+[(-74)+(-26)]+(-81+581)
=0+(-100)+500
=400
= -259 + 259 - 74 - 26 + 581 + 259 - 81
= 0 - 100 + 840 - 81
= 659
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(-123\right)+77+\left(-257\right)+23-43=\left(-123+23\right)+\left(77-257\right)-43=-100-180-43=-323\)
(−123)+77+(−257)+23−43
=(−123+23)+(77−257)−43
=−100−180−43
=−323
(259.11 - 252.257) : 258
= (259.11 - 259) : 258
= 259.(11 - 1) : 258
= 25.10
= 250
\(\left(25^9.11-25^2.25^7\right):28\)
\(=\left(25^9.11-25^9\right):25^8\)
\(=\left[25^9\left(11-1\right)\right]:25^8\)
\(=\left(25^9.10\right):25^8\)
\(=25^9:25^8.10\)
\(=25.10\)
\(=250\)