\(\frac{0,25\cdot x}{x}=\frac{5}{6}:0,125\)
\(\Leftrightarrow\frac{\frac{25}{100}\cdot x}{x}=\frac{5}{6}:\frac{125}{1000}\)
\(\Leftrightarrow\frac{\frac{1}{4}\cdot x}{x}=\frac{5}{6}:\frac{1}{8}\)
\(\Leftrightarrow\frac{\frac{1}{4}\cdot x}{x}=\frac{40}{6}\)
\(\Leftrightarrow\frac{1}{4}\cdot x=\frac{40}{6}\cdot x\)
=> x không thỏa mãn
Tim x, biet:
a/ \(3,8:\left(2.x\right)=\frac{1}{4}:2\frac{2}{3}\)
b/ \(\left(0,25.x\right):3=\frac{5}{6}:0,125\)
c/ \(0,01:2,5=\left(0,75.x\right):0,75\)
d/ \(1\frac{1}{3}:0,8=\frac{2}{3}:\left(0,1.x\right)\)
tìm x biết:
a,\(\left(\frac{1}{3}.x\right):\frac{2}{3}=1\frac{2}{3}:\frac{2}{5}\)
b,\(4,5:0,3=2,25:\left(0,1.x\right)\)
c,\(8:\left(\frac{1}{4}.x\right)=2:0,02\)
d,\(3:2\frac{1}{4}=\frac{3}{4}:\left(6.x\right)\)
e,\(3,8:\left(2.x\right)=\frac{1}{4}:2\frac{2}{3}\)
f,\(\left(0,25.x\right):3=\frac{5}{6}:0,125\)
g,\(1\frac{1}{3}:0,8=\frac{2}{3}:\left(0.1.x\right)\)
Tính
a) \(\left(\frac{3}{7}\right)^{21}:\left(\frac{9}{49}\right)^6\)
b) \(\left(0,125\right)^3.512\)
c) \(\left(0,25\right)^4.1024\)
Tính nhanh:
a) 7,5 . \(\left(\frac{-2}{5}\right).\left(-2,5\right)\)
b) ( - 50,5 ) . 8 . ( - 0,25 )
c) ( 0,125 ) . ( -3,7) . ( -2 )3
Thực hiện phép tính bằng cách hợp lí
A=\(\frac{\frac{3}{11}+1-\frac{3}{7}}{3+\frac{9}{11}-\frac{9}{7}}-\frac{\frac{1}{3}+0,25-\frac{1}{5}+0,125}{\frac{7}{6}+\frac{7}{8}-0,7+\frac{7}{16}}\)
B = \(\frac{1}{3}+\frac{1}{6}.\left(1+2\right)+\frac{1}{9}.\left(1+2+3\right)+...+\frac{1}{6045}.\left(1+2+3+...+2015\right)\)
Tìm x biết :
\(5.\left|\frac{3}{4}-\frac{2}{3}x\right|-3,25=-2\left\{\left(1.25\right)^2-2,5.0,25+\left(-0,25\right)^2\right\}\)
Tim x
( 0,25 . x ) : 3 = 5 / 6 : 0,125
\(3,2.\frac{15}{16}-\left(75\%+\frac{2}{7}\right):\left(-1\frac{1}{28}\right)\)
\(\left(0,25+12,5-\frac{5}{16}\right):\left[12-\frac{7}{12}:\left(\frac{3}{8}-\frac{1}{12}\right)\right]\)
\(\left(\frac{-3}{5}+\frac{5}{11}\right):\frac{-3}{7}+\left(\frac{-2}{5}+\frac{6}{5}\right):\frac{-3}{7}\)
\(14,5-\frac{8}{9}:\left(35-34\frac{8}{9}\right).\frac{9}{8}\)
\(1\frac{1}{15}-\left(\frac{1}{15}+\frac{4}{9}:\frac{-2}{3}-\frac{28}{16}.\frac{6}{35}\right)-\frac{3}{10}\)
Tìm x
\(\left(4,5-2x\right)\left(-3\frac{2}{3}\right)=\frac{11}{15}\)
\(\backslash34-x\backslash=\left(-3\right)^4\)
\(\left(4x^2-1\right)\left(\text{\x}\backslash-\frac{2}{3}\right)=0\)
\(\frac{3}{5}x-\frac{1}{2}\)\(x=\frac{-7}{20}\)
Giúp mình làm bài này trước 8h
Bài 1 : Thực hiện phép tính(nếu có thể )
a)\(\left(31\frac{6}{13}+5\frac{9}{41}\right)-36\frac{6}{13}\)
b) \(\frac{5}{3}+\left(\frac{-2}{7}\right)-\left(-1,2\right)-\left|1,4-0,2\right|\)
c) \(0,25+\frac{3}{5}-\left(\frac{1}{8}-\frac{2}{5}+1\frac{1}{4}\right)+\left|-\frac{3}{5}\right|\)
Bài 2 : Tìm x, biết
a) \(-\frac{3}{5}-x=0,75\)
b)\(x+\frac{1}{3}=\frac{2}{5}-\left(-\frac{1}{3}\right)\)
c)\(\left|2x-4\right|+1=5\)
