x+256=761
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)
a. \(317-\left\{-136+\left[-358+\left(136+317+358\right)\right]\right\}\)
\(=317-\left\{-136+\left[-358+811\right]\right\}\)
\(=317-\left\{-136+453\right\}\)
\(=317-317=0\)
b. \(-532-\left\{401-\left[613+\left(-613+401-532\right)\right]\right\}\)
\(=-532-\left\{401-\left[613-744\right]\right\}\)
\(=-532-\left\{401+131\right\}\)
\(=-532-532=-1064\)
c. \(703+\left\{-911+\left[256-\left(256-911+703\right)\right]\right\}\)
\(=703+\left\{-911+\left[256-48\right]\right\}\)
\(=703+\left\{-911+208\right\}\)
\(=703-703=0\)
d. \(527-\left[-761+\left(-203+761\right)\right]-\left(527+213\right)\)
\(=527-\left[-761+558\right]-740\)
\(=527+203-740=-10\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Hướng dẫn giải:
625 x 10 = 6250
540 : 10 = 54
3456 x 100 = 345 600
63 000 : 100 = 630
302 761 x 1000 = 302 761 000
1 011 000 : 1000 = 1011
Hướng dẫn giải:
625 x 10 = 6250
540 : 10 = 54
3456 x 100 = 345 600
63 000 : 100 = 630
302 761 x 1000 = 302 761 000
1 011 000 : 1000 = 1011
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) [(-655) - 711] - [988 - 711 + (-655)]
= -1366 - (988 - 711 - 655)
= -1366 - (277 - 655)
= -1366 - (-378)
= -1366 + 378 = -988
b) -198 + (-761) + 98 - (-761)
= -198 - 761 + 98 + 761
= (-198 - 761) + (98 + 761)
= -959 + 859
= -100
c) 45 . (-16) + (-45) . 82 - 45 . 2
= 45 . (-16) - 45 . 82 - 45 . 2
= -720 - 45 (82 - 2)
= -720 - 45 . 80
= -720 - 3600
= -4320
d) 75 . (2 - 192) - 192 . (-75)
= 75 . (-190) - 192 . (-75)
= -14250 - (-14400)
= -14250 + 14400
= 150
#Học tốt!!!
✫°”˜˜”°.¸♌️ NTTH♌️ ¸.°”˜˜”°✫(๖team lion๖) làm đúg r đó
![](https://rs.olm.vn/images/avt/0.png?1311)
256x57+256xX=25600
x=25600/256
x=100
x=100-57
x=43
x=......................
![](https://rs.olm.vn/images/avt/0.png?1311)
Trả lời :
a, - (x + 84) + 213 = - 16
=> - x - 84 + 213 = -16
=> - x + 129 = - 16
=> - x = - 145
=> x = 145
b, (x - 345) - 476 = (975 - 761) - (315 + x)
=> x - 345 - 476 = 214 - 315 - x
=> x - 821 = - 101 - x
=> x + x = - 101 + 821
=> 2x = 720
=> x = 360
c, x - (35 - x) = 15 - x
=> x - 35 + x = 15 - x
=x + x + x = 15 + 35
=> 3x = 50
=> x = \(\frac{50}{3}\)
a, \(-\left(x+84\right)+213=-16\Leftrightarrow-x-84=-229\Leftrightarrow x=145\)
b, \(\left(x-345\right)-476=\left(975-761\right)-\left(315+x\right)\)
\(\Leftrightarrow x-345-476=214-315-x\Leftrightarrow2x=720\Leftrightarrow x=360\)
c, \(x-\left(35-x\right)=15-x\Leftrightarrow x-35+x=15-x\Leftrightarrow x=50\)
x=761-256
x=505
x=761-256
x=505