\(=\left(4\cdot\dfrac{3}{4}-\dfrac{1}{2}\right)\cdot17=\dfrac{5}{2}\cdot17=\dfrac{85}{2}\)
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a) dfrac{5}{7}+dfrac{3}{4}.dfrac{-11}{2}b) (dfrac{12}{17}+dfrac{19}{7}) - (dfrac{-5}{17}-dfrac{3}{7})c) (0,125)^{12}.(-8)^{12}-dfrac{45^3}{15^3}d) 5dfrac{2}{7}.(-dfrac{1}{3})-2dfrac{2}{7}.(-dfrac{1}{3})e) dfrac{9^2.9^3}{3^9}
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a) \(\dfrac{5}{7}\)+\(\dfrac{3}{4}\).\(\dfrac{-11}{2}\)
b) (\(\dfrac{12}{17}\)+\(\dfrac{19}{7}\)) - (\(\dfrac{-5}{17}\)-\(\dfrac{3}{7}\))
c) (0,125)\(^{12}\).(-8)\(^{12}\)-\(\dfrac{45^3}{15^3}\)
d) \(5\dfrac{2}{7}\).(\(-\dfrac{1}{3}\))-\(2\dfrac{2}{7}\).(\(-\dfrac{1}{3}\))
e) \(\dfrac{9^2.9^3}{3^9}\)
\(A=\dfrac{\left(17\dfrac{1}{4}-4\dfrac{3}{16}-13\dfrac{5}{6}\right).\left(\dfrac{-4}{7}\right)+6\dfrac{3}{4}}{\left(5\dfrac{2}{7}-\dfrac{16}{3}\right):\left(6\dfrac{2}{3}-4\dfrac{1}{2}\right)}\)
o) \(\dfrac{\left(-1\right)^6.3^5.4^3}{9^2.2^5}\)
s) \(\dfrac{\dfrac{2}{7}+\dfrac{2}{5}+\dfrac{2}{17}-\dfrac{2}{25}}{\dfrac{3}{14}+\dfrac{3}{10}+\dfrac{3}{34}-\dfrac{3}{50}}\)
t) \(\sqrt{\dfrac{4}{9}}\) - \(\dfrac{1}{2}\): \(\left|\dfrac{-2}{3}\right|\)
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Tính bằng cách thuận tiện nhất
B=\(\dfrac{1+\dfrac{1}{7}+\dfrac{1}{7^2}-\dfrac{1}{7^3}}{4+\dfrac{4}{7}+\dfrac{4}{7^2}-\dfrac{4}{7^3}}x\dfrac{858585}{313131}x\left(-1\dfrac{14}{17}\right)\)
14 tháng 9 2021 lúc 9:06
Bài 2 : Thực hiện phép tính
\(a,\dfrac{-7}{2}+\dfrac{3}{4}-\dfrac{17}{12}\)
\(b,-\dfrac{1}{12}-\left(2\dfrac{5}{8}-\dfrac{1}{3}\right)\)
Bài 4: tìm x:a) dfrac{4}{3} + (1,25 - x) 2,25b) dfrac{17}{6} - (x - dfrac{7}{6} ) dfrac{7}{4}c) 4 - (2x + 1) 3 - dfrac{1}{3}bài 15:a) (dfrac{-2}{3})9 : x (dfrac{-2}{3})b) x : (dfrac{4}{9})5 (dfrac{4}{9})4c) (x + 4)3 -125d) (10 - 5x)3 64e) (4x + 5)2 81Bài 16:a) 4 - 1dfrac{2}{5} - dfrac{8}{3}b) -0,6 - dfrac{-4}{9} - dfrac{16}{15}c) -dfrac{15}{4} . (dfrac{-7}{15}) . (-2dfrac{2}{5}Gi ải gấp giúp mình ạ, mình rất cần gấp
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Bài 4: tìm x:
a) \(\dfrac{4}{3}\) + (1,25 - x) = 2,25
b) \(\dfrac{17}{6}\) - (x - \(\dfrac{7}{6}\) ) = \(\dfrac{7}{4}\)
c) 4 - (2x + 1) = 3 - \(\dfrac{1}{3}\)
bài 15:
a) (\(\dfrac{-2}{3}\))9 : x = (\(\dfrac{-2}{3}\))
b) x : (\(\dfrac{4}{9}\))5 = (\(\dfrac{4}{9}\))4
c) (x + 4)3 = -125
d) (10 - 5x)3 = 64
e) (4x + 5)2 = 81
Bài 16:
a) 4 - \(1\dfrac{2}{5}\) - \(\dfrac{8}{3}\)
b) -0,6 - \(\dfrac{-4}{9}\) - \(\dfrac{16}{15}\)
c) \(-\dfrac{15}{4}\) . (\(\dfrac{-7}{15}\)) . (\(-2\dfrac{2}{5}\)
Gi ải gấp giúp mình ạ, mình rất cần gấp
21 tháng 10 2021 lúc 12:30
7)\(\left(2^2:\dfrac{4}{3}-\dfrac{1}{2}\right).\dfrac{6}{5}-17\)
a)\(\dfrac{-9}{34}\).\(\dfrac{17}{4}\)
b)\(\dfrac{17}{15}\):\(\dfrac{4}{3}\)
c)\(4\dfrac{1}{5}\):\(\left(-2\dfrac{4}{5}\right)\)
giúp mình nhé ! mình cảm ơn nhé!
17 tháng 8 2021 lúc 10:56
Tính nhanh
\(c,\dfrac{-5}{13}-\left(\dfrac{3}{5}+\dfrac{3}{13}-\dfrac{4}{10}\right)\)
\(d,\left(\dfrac{1}{9}-\dfrac{9}{17}\right)+\dfrac{3}{6}-\left(\dfrac{12}{17}-\dfrac{1}{2}\right)+\dfrac{5}{9}\)
Bài 1:
a,3^7 : 3^5- left(dfrac{5}{17}right)^0 b,left(dfrac{5}{2}right)^{13} : left(dfrac{1}{2}+2right)^3 c, 8.left(dfrac{1}{4}right)^3 +left(dfrac{2}{27}right)^0 - dfrac{1}{8}
Bài 2 :
a, dfrac{3^4.4^4}{6^4} b,dfrac{15^3}{10^3} c, dfrac{4^2.12^5}{9^2.2^{10}} d, dfrac{6^2+5.2^2+4}{15}
Bài 3 :
a, dfrac{left(dfrac{2}{3}right)^3.left(dfrac{-3}{4}right)^2.left(-1right)^5}{left(dfrac{2}{5}right)^2.left(dfrac{-5}{12}right)^2} b,dfrac{6^6+6^3.3^3+3^6}{-73}
Mọi người giúp mình nhé mình sẽ ch...
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Bài 1:
a,\(3^7\) : \(3^5\)- \(\left(\dfrac{5}{17}\right)^0\) b,\(\left(\dfrac{5}{2}\right)^{13}\) : \(\left(\dfrac{1}{2}+2\right)^3\) c, 8.\(\left(\dfrac{1}{4}\right)^3\) +\(\left(\dfrac{2}{27}\right)^0\) - \(\dfrac{1}{8}\)
Bài 2 :
a, \(\dfrac{3^4.4^4}{6^4}\) b,\(\dfrac{15^3}{10^3}\) c, \(\dfrac{4^2.12^5}{9^2.2^{10}}\) d, \(\dfrac{6^2+5.2^2+4}{15}\)
Bài 3 :
a, \(\dfrac{\left(\dfrac{2}{3}\right)^3.\left(\dfrac{-3}{4}\right)^2.\left(-1\right)^5}{\left(\dfrac{2}{5}\right)^2.\left(\dfrac{-5}{12}\right)^2}\) b,\(\dfrac{6^6+6^3.3^3+3^6}{-73}\)
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