-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

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) = -5.639

b) = -0.32

c) = 16.027

d) = -2.16

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

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 = - (5,17 + 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

Lời giải:

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

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,

\(a,-5,17-0,469=-5,639\\ b,-2,06+1,73=-0,33\\ c,\left(-5,17\right)\cdot3,1=-16,027\\ d,\left(-9,18\right):4,25=-2,16\)

|-5,17-0,469| + (5,17). (-3,1)+| -2,05+1,73| =-10,068

**** cho mk nhé

a) -5,639

b) -0,32

c) 16,027

d) -2,16

a) -5.639

b) -0.32

c) 16.027

d) -2.16

a, -5,639

b  -0,32

c   16,027

d   -2,16

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