Tính nhanh (nếu có thể):
\(a,\frac{\frac{3}{41}-\frac{12}{47}+\frac{27}{53}}{\frac{4}{41}-\frac{16}{47}+\frac{36}{53}}+\frac{-0,25.\frac{-2}{3}-75\%:(\frac{-1}{2}+\frac{2}{3})}{|-1\frac{1}{2}|.(\frac{-2}{3}-0,75:\frac{3}{-2})}\)
\(b,A=158.(\frac{12-\frac{12}{7}-\frac{12}{289}-\frac{12}{85}}{4-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}}:\frac{5+\frac{5}{13}+\frac{5}{169}+\frac{5}{91}}{6+\frac{6}{13}+\frac{6}{169}+\frac{6}{91}}).\frac{50550505}{711711711}\)
a) \(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)=0\)
b) \(\left(\frac{x}{3}-5\frac{1}{4}\right)^2-\frac{-2}{5}=1\frac{1}{25}\)
c) \(\frac{17-x}{12}=\frac{3}{17-x}\)
d) \(1\frac{1}{3}-25\%\left(x-\frac{8}{3}\right)+2x=1,6:\frac{3}{5}\)
Bài 1:Tìm x,biết
a) \(x-\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
b)\(x+\frac{15}{90.94}+\frac{15}{94.98}+\frac{15}{98.102}+...+\frac{15}{146.150}=\frac{2}{3}\)
c)\(x-\frac{1}{2}-\frac{1}{6}-\frac{1}{12}-\frac{1}{20}-\frac{1}{30}-\frac{1}{42}-\frac{1}{56}=\frac{5}{24}\)
d)\(8-\frac{8-\frac{8}{5}+\frac{8}{25}-\frac{8}{125}}{9-\frac{9}{5}+\frac{9}{25}-\frac{9}{125}}:\frac{161616}{151515}=\frac{4+\frac{4}{73}-\frac{4}{115}}{5+\frac{5}{73}-\frac{1}{23}}\)
Thực hiện phép tính
\(a,(\frac{-5}{28}+1,75+\frac{8}{35}).(-3\frac{9}{20})\) \(b,(6-2\frac{4}{5}).3\frac{1}{8}-1\frac{3}{5}:\frac{1}{4}\)
\(c,(\frac{7-5}{24}+0,75+\frac{7}{12}):(-2\frac{1}{8})\) \(d,8\frac{2}{7}-(3\frac{4}{7}+4\frac{2}{7})\)
\(e,\left(-3,2\right).\frac{-15}{64}+(0,8-2\frac{4}{15}):3\frac{2}{3}\) \(f,1\frac{13}{15}.\left(0,5\right)^2.3+(\frac{8}{15}-1\frac{19}{60}):1\frac{23}{24}\)
\(g,1,4.\frac{15}{49}-(\frac{4}{5}+\frac{2}{3}):2\frac{1}{5}\)
a,\(\frac{-5}{6}\) - x = \(\frac{7}{12}\) + \(\frac{-1}{3}\)
b,\(\frac{x+3}{-15}\) = \(\frac{1}{3}\)
c, \(\frac{-15}{x-1}\)=\(\frac{-3}{5}\)
d,\(\frac{1}{2}\)x-\(\frac{2}{5}\)=\(\frac{1}{5}\)
e,-\(\frac{2}{3}\)x+\(\frac{1}{5}\)=\(\frac{1}{10}\)
f,\(\frac{4}{5}\)- \(\frac{1}{2}\)x = \(\frac{1}{10}\)
1, tính
\(a,(\frac{-7}{3})^3\div(\frac{-7}{3})^2\)
\(b,(\frac{-4}{9})\div(\frac{-4}{9})^3\)
\(c,(\frac{1}{5})^{10}\div(\frac{1}{5})^7\)
2, tìm x
A, \(\frac{-x}{7}=\frac{1}{-21}\)
\(B,4\frac{2}{5}\cdot0,5-1\frac{3}{7}\)
\(c,3x^2-2x=0\)
\(d,9x^2-1=0\)
bài 1
a, 27 + 46 + 68 + 54 +73
b,2016 - ( 2016 -2017)
c, \(\frac{2}{3}+\frac{1}{3}.\left(\frac{-4}{9}+\frac{5}{6}\right):\frac{7}{12}\)
bài 2:thực hiện phép tính
a. 75% - 1\(\frac{1}{2}\)+0,5:\(\frac{5}{12}\)
b, -1\(\frac{1}{4}\).\(\frac{\left(-2\right)^2}{5}\)+\(\frac{1}{5}\):2
bài 3: Tìm số nguyên x biết
a, 75%\(1\frac{1}{2}\)+ + 0,5: \(\frac{5}{12}\) b, -1\(\frac{1}{2}\).\(\frac{\left(-2\right)^2}{5}\)+ \(\frac{1}{5}\): 2