\(9\times\left(\dfrac{-1}{3}\right)^3+\dfrac{1}{3}:0,25-5\dfrac{3}{4}=\dfrac{9}{1}\times\left(\dfrac{-1}{27}\right)+\dfrac{1}{3}:\dfrac{1}{4}-\dfrac{23}{4}\)
\(=\left(\dfrac{-9}{27}\right)+\dfrac{4}{3}-\dfrac{23}{4}=\left(\dfrac{-1}{3}\right)+\dfrac{4}{3}-\dfrac{23}{4}=\dfrac{3}{3}-\dfrac{23}{4}=1-\dfrac{23}{4}=\dfrac{4}{4}-\dfrac{23}{4}=\dfrac{-19}{4}\)
tính
A( \(\dfrac{7}{8}-0,25\) ) \(:\left(\dfrac{5}{6}-0,75\right)^2\)
B) \(\dfrac{3}{4}.1\dfrac{4}{9}-\left(\dfrac{-3}{4}\right)\)
\(\left(\dfrac{-9}{13}\right)\left(\dfrac{-4}{5}\right)\)
\(-0,7:\dfrac{3}{2}\)
\(\dfrac{7}{6}.3\dfrac{1}{4}+\dfrac{7}{6}.\left(-0,25\right)\)
Tìm x
\(\dfrac{3}{4}x+\dfrac{-1}{2}=\dfrac{-13}{8}\)
\(\left|x\right|+0,25=1,75.3\)
\(\dfrac{2x-1}{3}=\dfrac{-5}{0,6}\)
Thực hiện phép tính hợp lý (nếu có thể) :
a) (\(31\dfrac{6}{13}\) + \(5\dfrac{9}{41}\) ) - \(36\dfrac{6}{13}\)
b) \(\dfrac{5}{3}\) +( \(\dfrac{-2}{7}\) ) - (-1,2)
c) 0,25 + \(\dfrac{3}{5}\) - (\(\dfrac{1}{8}\) - \(\dfrac{2}{5}\) + \(1\dfrac{1}{4}\) )
\(\dfrac{6}{5}.\sqrt{1\dfrac{9}{16}}-\left(-\dfrac{3}{4}\right)^2:0,25\)
a\(\dfrac{-3}{4}x+1=\dfrac{5}{6}\)
b \(\left(2x-3\right).\left(x-5\right)=0\)
c \(\dfrac{1}{2}-|x+1|=0,25\)
a,0,4.\(\sqrt{0,25-\sqrt{\dfrac{1}{4}}}\)
b,3/2+2(x-1)=-5\(\dfrac{1}{2}\)
c.7/4|x+4/5|+1/3=8/3
a,2.(\(\dfrac{1}{4}\)+x)\(^3\)=(\(-\dfrac{27}{4}\))
b,(x+\(\dfrac{1}{2}\))\(^3\):3=\(\dfrac{-1}{81}\)
c,(\(\dfrac{2}{3}\)-x)\(^2\)=1:\(\dfrac{4}{9}\)
d,(2x-\(\dfrac{1}{5}\))\(^2\)+\(\dfrac{16}{25}\)=1
e,(\(\dfrac{2}{5}\)-3x)\(^2\)-\(\dfrac{1}{5}\)=\(\dfrac{4}{25}\)
1. a) \(\dfrac{5}{3}+\dfrac{-2}{7}-\left(-1,2\right)\)
b) \(0,25+\dfrac{3}{5}-\left(\dfrac{1}{8}-\dfrac{2}{5}+1\dfrac{1}{4}\right)\)
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