Tính
a) \(-5,17-0,469\) b) \(-2,05+1,73\)
c) \(\left(-5,17\right).\left(-3,1\right)\) d) \(\left(-9,18\right):4,25\)
a/ \(\left|x\right|=\left|-2,5\right|\)
b/ \(\left|x-2\right|=\dfrac{4}{5}\)
a/ -5,17 - 0,469
b/ -2,06 + 1,73
c/ (-5,17).(3,1)
d/ (-9,18) : 4,25
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,
\(a,-5,17-0,469=-5,639\\ b,-2,06+1,73=-0,33\\ c,\left(-5,17\right)\cdot3,1=-16,027\\ d,\left(-9,18\right):4,25=-2,16\)
a) -5,17 - 0,469
b) -2,05 + 1,73
c) (-5,17).(-3,1)
d) (-9,18) : 4,25
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
- 5,17 - 0,469 = - 5,639
-2,05 + 1,73 = - 0,32
( - 5,17 ) . ( -3,1)=16,027
( - 9,18 ) : 4,25 = 2,16
tính:
a)-5,17 - 0,469
b)-2,05 + 1,73
c)(-5,17) x (-3,1)
d)(-9,18) : 4,25
-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
Tính
a) -5,17 – 0,469
b) -2,05 + 1,73
c) (-5,17).(-3,1)
d) (-9,18) : 4,25
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
|5,17-0,469| + (-5,17) .(-3,1) + |-2,05+1,73|
|-5,17-0,469| + (5,17). (-3,1)+| -2,05+1,73| = ?
|-5,17-0,469| + (5,17). (-3,1)+| -2,05+1,73| =-10,068
**** cho mk nhé
Tính:
a) -5,17 - 0, 469
b) -2,05 + 1, 73
c) (-5,17) . (-3,1)
d) ( -9,18) : 4,25
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 b) -2,05 + 1,73
Tính -5,17-0,469
-2,05+1,73
dtv sai nhe
nguyen dinh dung bai nay kho lam ko phai de dau