Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1: =29-16-3*2=13-6=7
2: =35-12+(-14)-2
=23-16=7
3: =4*3125-32:16
=12500-2
=12498
4: =-452+67-75+452=-8
5: =18+99*18-3^5-2^5
=1800-275
=1525
d: =-452+67-75+452=-8
e: \(=1997-\left[10\cdot8:8+8\right]=1997-11=1986\)
a) 23 . 17 - 23 . 14
= 23(17-14)
=23. 3= 24
b) 80 - ( 4 . 5 - 3 . 23 )
= 80- 22. (5-3.2)= 80- 22.(-1)
= 80- 4.(-1)= 80- (-4)= 84
c) 35 - { 12 - [ -14 + ( -2) }
= 35 - { 12 - (-16) }
=35- 28= 7
d) 49 - ( -45) - 23
= 94-23= 71
e) 13 - 18 - ( -42) - 15
= -5 -(-42) -15
= -20+42= 22
g) -452 - ( -67 + 75 - 452 )
= -452- (8-452)
= -452 -(- 444)= -8
h) |31−17|−|13−52|
= 14- 39= -25
80 -(4.52 -3.23)
= 80- (4.25- 3.8)
= 80- (100-24)
= 80-76= 4
1) \(-452-\left(-67+75-452\right)\)
\(=-452+67-75+452\)
\(=-\left(452-67\right)-75+452\)
\(=-385-75+452\)
\(=-\left(385+75\right)+452\)
\(=-460+452\)
\(=-\left(460-452\right)\)
\(=-8\)
b) \(35-\left\{12-\left[-14+\left(-2\right)\right]\right\}\)
\(=35-\left[12-\left(-14-2\right)\right]\)
\(=35-\left\{12-\left[-\left(14+2\right)\right]\right\}\)
\(=35-\left[12-\left(-16\right)\right]\)
\(=35-\left(12+16\right)\)
\(=35-28\)
\(=7\)
c) \(-\left|-5\right|+\left(-19\right)+18+\left|11-4\right|-57\)
\(=-5-19+18+\left|7\right|-57\)
\(=-5-19+18+7-57\)
\(=-\left(5+19\right)+18+7-57\)
\(=-24+18+7-57\)
\(=-\left(24-18\right)+7-57\)
\(=-6+7-57\)
\(=-\left(6-7\right)-57\)
\(=-\left(-1\right)-57\)
\(=1-57\)
\(=-57+1\)
\(=-\left(57-1\right)\)
\(=-56\)
Mình đặt tên a,b,c cho 3 ý cho dễ gọi nha.
a,\(-452-\left(-67+75-452\right)\)
\(=-452+67-75+452\)
\(=-8\)
b,\(35-\left\{12-\left[-14+\left(-2\right)\right]\right\}\)
\(=35-\left(12+14-2\right)\)
\(=35-24\)
\(=11\)
c,\(-\left|-5\right|+\left(-19\right)+18+\left|11-4\right|-57\)
\(=-5-19+18+7-57\)
\(=-56\)
\(a,35-\left\{12-\left[-14+\left(-2\right)\right]\right\}\\ =35-\left\{12-\left(-16\right)\right\}\\ =35-28\\ =7\\ b,49-\left(-59\right)-23\\ =108-23\\ =85\\ c,-452-\left(-67+75-452\right)\\ =-452-\left(8-452\right)\\ =-452-8+452\\ =\left(-452+452\right)-8\\ =0-8\\ =-8\)
a)\(35-\left\{12-\left[-14+\left(-2\right)\right]\right\}\)
\(=35-\left(12+16\right)\)
\(=35-28=7\)
b)\(49-\left(-59\right)-23\)
\(=49+59-23\)
\(=108-23=85\)
c)\(-452-\left(-67+75-452\right)\)
\(=-452+67-75+452\)
\(=\left(-452+452\right)+\left(67-75\right)\)
\(=0+\left(-8\right)=-8\)
1) 3x = 45 + 15 = 60
x = 60 : 3 = 20
2) 5x = 50 - 35 = 15
x = 15 : 5 = 3
3) (2x - 5) + 17 = 6
2x - 5 = 6 - 17
2x - 5 = -11
2x = -11 + 5
2x = -6
x = -6 : 2 = -3
4) 10 - 2(4 -3x) = -4
2(4 - 3x) = -4 - 10 = -14
4 - 3x = -14 : 2 = -7
3x = -7 - 4 = -18
x = -18 : 3 = -6
\(\left\{{}\begin{matrix}\left\{{}\begin{matrix}3x-15=45\Leftrightarrow3x=60\Leftrightarrow x=20\\35-5x=50\Leftrightarrow5x=-15\Leftrightarrow x=-3\end{matrix}\right.\\\left\{{}\begin{matrix}\left(2x-5\right)+17=6\Leftrightarrow2x+5=-11\Leftrightarrow2x=-16\Leftrightarrow x=-8\\10-2\left(4-3x\right)=-4\Leftrightarrow8-6x=14\Leftrightarrow6x=-6\Leftrightarrow x=-1\end{matrix}\right.\\\left\{{}\begin{matrix}-12+3\left(-x+7\right)=-18\Leftrightarrow-3x+21=-6\Leftrightarrow-3x=-27\Leftrightarrow x=9\\24:\left(3x-2\right)=-3\Leftrightarrow3x-2=-8\Leftrightarrow3x=-6\Leftrightarrow x=-2\end{matrix}\right.\\-45:5\left(-3-2x\right)=3\Leftrightarrow-15-10x=-15\Leftrightarrow10x=0\Leftrightarrow x=0\end{matrix}\right.\)
bấm máy tính đi
a) 96
b) 69
c)96
d)96
e)69