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\(\left|-34\right|+(-4)\cdot(-1)^{2008}+(17-19)^2\)
\(=34+4+(-2)^2\)
\(=34+4+4\)
\(=42\)
\((-31)\cdot81-18\cdot31-31\)
\(=31\cdot(-81)-18\cdot31-31\)
\(=31\cdot(-81)-18-1\)
\(=31\cdot(-100)=-3100\)
a) \(175-\left(-25\right)+62-\left(1200+62\right)\)
\(=\left(175+25\right)+\left(62-62\right)-1200\)
\(=200-1200\)
\(=-1000\)
b) \(\left(-25\right)\cdot8\cdot\left(-4\right)\cdot\left(-125\right)\cdot3\)
\(=3\left[\left(-25\right)\cdot\left(-4\right)\right]\left[\left(-125\right)\cdot8\right]\)
\(=3\cdot100\cdot\left(-1000\right)\)
\(=-300000\)
c) \(27\cdot\left(-17\right)+17\cdot\left(-73\right)\)
\(=27\cdot\left(-17\right)+73\cdot\left(-17\right)\)
\(=\left(-17\right)\cdot\left(27+73\right)\)
\(=\left(-17\right)\cdot100\)
\(=-1700\)
d) \(512\cdot\left(2-128\right)-128\cdot\left(-512\right)\)
\(=512\cdot\left(2-128\right)+128\cdot512\)
\(=512\left(2-128+128\right)\)
\(=512\cdot2\)
\(=1024\)
c: \(24:\left\{300:\left[350-\left(175+25\right)\right]\cdot102\right\}\)
\(=\dfrac{24}{300:\left(350-200\right)\cdot102}\)
\(=\dfrac{24}{300:150\cdot102}=\dfrac{24}{204}=\dfrac{2}{17}\)
d: \(6:2\cdot3+4\cdot79-2\cdot5\)
\(=9-10+316\)
=316-1
=315
\(C)24:\left\{300:\left[350-\left(175+25\right)\right]\cdot102^0\right\}\)
\(=24:\left[300:\left(350-200\right)\cdot1\right]\)
\(=24:\left(300:150\right)\)
\(=24:2\)
\(=12\)
\(D)6^2:2\cdot3+4^2\cdot79-2^3\cdot5\)
\(=36:2\cdot3+16\cdot79-8\cdot5\)
\(=54+1264-40\)
\(=1278\)
\(25-\left(62+25\right)+\left(75-62\right)-\left(-25\right)\)
\(=25-62-25+75-62+25\)
\(=\left(25-25\right)+\left(-62-62\right)+\left(75+25\right)\)
\(=0+\left(-124\right)+100=224\)
Lấy 1200 : 62 = 19 dư 22.
=> Sô bị chia cần tìm là:
62 . 19 + 18 = 1196 (< 1200 ( thỏa mãn))
25+62+94x25+85
=25x(1+94)+62+85
=25x95+62+85
=2375+62+85
=2522
k mk nha bạn
(5346-2808) : 54 + 51
=2538 : 54 + 51
= 47 + 51 = 98
187 . ( 38 + 62 ) - 87 . (62 + 38 )
=187 . 100 - 87 . 100
= 100 . ( 187 - 87 )
= 100 . 100
= 10000
25. { 32 : [12 -4 + 4 . ( 16 : 8 )]}
= 25. { 32 : [12 - 4 + 8]}
= 25 . { 32 : [8 + 8 ]}
= 25 . { 32 : 16 }
= 25 . 2 =50
A = 50 +51 + 52 + ......+ 99+100
A = ( 100 + 50 ) . 51 : 2
A = 150 .51 : 2
A = 7650 : 2
A = 3825
Chuc ban hoc tot
\(\left(5346-2808\right):54+51\)
\(=2538:54+51\)
\(=47+51=98\)
\(187\left(38+62\right)-87\left(62+38\right)\)
\(=187.100-87.100\)
\(=100\left(187-87\right)\)
\(=100.100=10000\)
\(25\left\{32:\left[12-4+4\left(16:8\right)\right]\right\}\)
\(=25\left\{32:\left[12-4+4.2\right]\right\}\)
\(=25\left\{32:\left[12-4+8\right]\right\}\)
\(=25\left\{32:16\right\}\)
\(=25.2=50\)
\(A=50+51+52+......+100\)
\(=\dfrac{\left[\left(100-50\right):1+1\right]\left(100+50\right)}{2}\)
\(=3825\)
175 - (-25) + 62 -(1200+62)
= (175+25)+(62-1200-62)
= 200 + (-1200)
= -1000
kết quả là:-1000