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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) \(512\cdot\left(2-128\right)-128\cdot\left(-512\right)\)
\(=512\cdot\left(2-128\right)+128\cdot512\)
\(=512\left(2-128+128\right)\)
\(=512\cdot2\)
\(=1024\)
1) 125.(-24) + 24.225.
\(=24\left(-125+225\right)=24.100=2400.\)
2) 512.(2 – 128) – 128. (-512).
\(=512\left(2-128+128\right)=512.2=1024.\)
a: \(13\cdot\left(-7\right)=-91\)
b: \(\left(-8\right)\cdot\left(-25\right)=200\)
c: =>x+4=98-20=78
hay x=74
g: \(=35\left(12+182-94\right)=35\cdot100=3500\)
h: \(=-8537+1975+8537=1975\)
a) 27.(-17)+(-17).73
= -17 ( 27+73)
= -17 . 100
= -1700
b) 512 . ( 2- 128) -128. (-512)
= 512.(2-128) - (-128).512
= 512(2-128+128)
= 512 . 2
= 1024
a. 24 x (-125 + 225)
= 24 x 100
=2400
b. -125 x ( 24 -36 )
= -125 x -12
= 1500
c. 512 x (2 -128+128)
= 512 x 2
= 1024
d. \([4.25].\left[\left(-2\right).\left(-5\right)\right].\left[125.\left(-8\right)\right]\)
= 100.10.(-1000)
= -1000000
a. 24 x (-125 + 225)
= 24 x 100
=2400
b. -125 x ( 24 -36 )
= -125 x -12
= 1500
c. 512 x (2 -128+128)
= 512 x 2
= 1024
d.
= 100.10.(-1000)
= -1000000
13 . ( - 7 ) = - 91
( - 8 ) . ( - 25 ) = 200
25 . ( - 47 ) . ( - 4 ) = ( - 100 ) . ( - 47 ) = 4700
8 . ( 125 - 3000 ) = 8 . 125 - 3000 = 1000 - 3000 = - 2000
512 . ( 2 - 128 ) - 128 . ( - 512 ) = 512 . ( 2 - 128 + 128 ) = 512 . 2 = 1024
13 x (-7) = -91
(-8) x (-25) = 200
25 x (-47) x (-4) = 4700
8 x (125 - 3000) = -23000
512 x (2 - 128) - 128 x (-512) = 1024
Nếu sai thì thôi
Học tốt!!!
(35-17)+(17+20-35)
=35-17+17+20-35
=(35-35)+(-17+17)+20
=0+0+20
=20
Đây là thực hiện phép tính nha các bạn, mình xin cảm ơn mình đang cần gấp.
\(=\left(-50+19+143\right)-\left(-79+25+48\right)\)
\(=-50+19+143+79-25-48\)
\(=118\)
\(\left(-25\right)\left(75-45\right)-75\left(45-25\right)\)
\(\left(-25\right).30-75.20\)
\(=-2250\)
\(\left(-37-17\right).\left(-9\right)+35\left(-9-11\right)\)
\(-54.\left(-9\right)+35.\left(-20\right)\)
\(-763\)
Đánh mỏi tay quá
a) \(\left(-25\right).8.\left(-4\right).\left(-125\right).3\)
\(=\text{ }\left[\left(-25\right).\left(-4\right)\right].\text{ }\left[8.\left(-125\right)\right].3\)
\(=100.\left(-1000\right).3\)
\(=-100000.3\)
\(=-300000\)
b) \(27.\left(-17\right)+17.\left(-73\right)\)
\(=\left(-27\right).17+17.\left(-73\right)\)
\(=17\left[\left(-27\right).\left(-73\right)\right]\)
\(=17.\left(-100\right)\)
\(=-1700\)
c) \(512\left(2-128\right)-128\left(-512\right)\)
\(=512.2-512.128-128\left(-512\right)\)
\(=512.2-128\left[512+\left(-512\right)\right]\)
\(=1024-128.0\)
\(=1024-0\)
\(=1024\)
a, (-25).8.(-4).(-125).3
= (-25).(-8).(-4).(-125).(-3)
= {(-25).(-4)}.{(-8).(-125)}.(-3)
= 100.1000.(-3)
= 100000.(-3)
= -300000
b, 27.(-17)+17.(-73)
= 27.17+17.73
= 27.(17+73)
=27.90
=2430
c, 512.(2-128)-128.(-512)
= 512.(-2) - 512.128 - (-128).512
= { 512.{(-2)-128-(-128)}
= 512.{(-2).256}
=512.(-512)
= -262144