Tính: (-5,17).(-3,1)
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
-5,17 - 0,469 = -5,639
-2,05 + 1,73 = -0,32
(-5,17) x (-3,1) = 16,027
(-9,18) : 4,25 = -2,16
![](https://rs.olm.vn/images/avt/0.png?1311)
a) -5,17 – 0,469
= (-5,17) + (-0,469)
= -5,639
b) -2,05 + 1,73
= -0,32
c) (-5,17).(-3,1) = 16,027
d) (-9,18) : 4,25 = -2,16
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
|-5,17-0,469| + (5,17). (-3,1)+| -2,05+1,73| =-10,068
**** cho mk nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
a) -5.17-0,469=-5,639
b) -2,05+1,73=-0,32
c)(-5,17).(-3,1)=16,027
d)(-9,18):4,25=-2,16
a) -5,17 - 0,469 = -5,639
b) -2,05 + 1,73 = -0,32
c) ( -5,17) x (-3,1) = 16,027
d) ( -9,18) : 4,25 = -2,16
![](https://rs.olm.vn/images/avt/0.png?1311)
a) -5,17 - 0,469 = - (5,17 + 0,469 ) = -5,639
b) -2,05 + 1,73 = -( 2,05 - 1,73) = - 0,32
c) (-5,17).(-3,1) = 16,027
d) (-9,18) : 4,25 = -2,16
a, -5,17 - 0,469 = -5.639
b, -2,05 + 1,73 = -1,31
c, ( -5,17) . (-3,1) = 16,027
d, (-9,18) : 4,25 = -2,16
![](https://rs.olm.vn/images/avt/0.png?1311)
I,
a,
\(\left|x\right|=\left|-2,5\right|\\ \Rightarrow\left|x\right|=2,5\\ \Leftrightarrow\left\{{}\begin{matrix}x=2,5\\x=-2,5\end{matrix}\right.\\ Vậyx\in\left\{-2,5;2,5\right\}\)
b,
\(\left|x-2\right|=\dfrac{4}{5}\\ \Rightarrow\left\{{}\begin{matrix}x-2=\dfrac{4}{5}\\x-2=-\dfrac{4}{5}\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}x=\dfrac{14}{5}\\x=\dfrac{6}{5}\end{matrix}\right.\\ Vậyx\in\left\{\dfrac{14}{5};\dfrac{6}{5}\right\}\)
II,
\(a,-5,17-0,469=-5,639\\ b,-2,06+1,73=-0,33\\ c,\left(-5,17\right)\cdot3,1=-16,027\\ d,\left(-9,18\right):4,25=-2,16\)
(-5,17).(-3,1) = 16,027