![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1}{8}\div\frac{27}{-20}+\left(75\%-\frac{5}{16}\right)\div\frac{7}{2}\)
\(=\frac{1}{8}\times\frac{-20}{27}+\left(\frac{75}{100}-\frac{5}{16}\right)\times\frac{2}{7}\)
\(=\frac{-10}{108}+\left(\frac{12}{16}-\frac{5}{16}\right)\times\frac{2}{7}\)
\(=\frac{-5}{54}+\frac{7}{16}\times\frac{2}{7}\)
\(=\frac{-5}{54}+\frac{2}{16}\)
\(=\frac{-5}{54}+\frac{1}{8}\)
\(=\frac{-20}{216}+\frac{27}{216}\)
\(=\frac{7}{216}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(\dfrac{2}{5}.\left(\dfrac{2}{3}-\dfrac{1}{4}\right)+\dfrac{1}{2}\\ =\dfrac{2}{5}.\left(\dfrac{8}{12}-\dfrac{3}{12}\right)+\dfrac{1}{2}\\ =\dfrac{2}{5}.\dfrac{5}{12}+\dfrac{1}{2}\\ =\dfrac{1}{6}+\dfrac{1}{2}\\ =\dfrac{1}{6}+\dfrac{3}{6}\\ =\dfrac{2}{3}\)
b) \(1,8:\dfrac{27}{-20}+\left(75\%-\dfrac{5}{16}\right):3\dfrac{1}{2}\\ =\dfrac{9}{5}:\dfrac{-27}{20}+\left(\dfrac{3}{4}-\dfrac{5}{16}\right):\dfrac{7}{2}\\ =\dfrac{9}{5}.\dfrac{-20}{27}+\left(\dfrac{12}{16}-\dfrac{5}{16}\right):\dfrac{7}{2}\\ =\dfrac{-4}{3}+\dfrac{7}{16}:\dfrac{7}{2}\\ =\dfrac{-4}{3}+\dfrac{7}{16}.\dfrac{2}{7}\\ =\dfrac{-4}{3}+\dfrac{1}{8}\\ =\dfrac{-32}{24}+\dfrac{3}{24}\\ =\dfrac{-29}{24}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
\(\frac{8}{11}.\frac{14}{23}+\frac{9}{23}:\frac{11}{8}-\frac{8}{11} \)
\(=\frac{8}{11}.\frac{14}{23}+\frac{9}{23}.\frac{8}{11}-\frac{8}{11}\)
\(=\frac{8}{23}.(\frac{14}{23}+\frac{9}{23}-1)\)
\(=\frac{8}{23}.0\)
=0
b)
\(1,8.\frac{-20}{27}\)+(75%\(-\frac{5}{16}):3\frac{1}{2}\)
=\(\frac{9}{5}.\frac{-20}{27}+(\frac{3}{4}-\frac{5}{16}):\frac{7}{2}\)
=\(\frac{-4}{3}+\frac{1}{8}\)
=\(\frac{-29}{24}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.27.75+25.27-150\)
\(=27.\left(75+25\right)-150\)
\(=27.100-150\)
\(=2700-150\)
\(=2550\)
a, 27.75+25.27-150 b,3.52-16:23 d, 60 : {[( 12-3 ).2] +2}
= 27.(75+25)-150 = 3.25-16:4 = 60 : {[ 9.2] + 2
= 27. 100 - 150 = 75 - 4 = 60 : 18 + 2
= 2700 - 150 = 71 = 60 : 20
= 2550 = 3
Tk mik nha
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=\left(\frac{21}{5}-\frac{3}{5}\right):\frac{16}{8}:\frac{9}{10}\)
\(A=\frac{18}{5}:\frac{16}{8}:\frac{9}{10}\)
\(A=\frac{18}{5}\times\frac{8}{16}\times\frac{10}{9}\)
\(A=\frac{9}{5}\times\frac{8}{8}\times\frac{10}{9}\)
\(A=\frac{72}{40}\times\frac{10}{9}\)
\(A=\frac{8}{4}\times\frac{1}{1}\)
\(A=\frac{8}{9}\)
\(B=\left(1\frac{1}{20}+\frac{36}{100}\right):\frac{84}{25}:\left(2+\frac{14}{16}\right)\)
\(B=\left(\frac{21}{20}+\frac{36}{100}\right):\frac{84}{25}:\left(\frac{32}{16}+\frac{14}{16}\right)\)
\(B=\left(\frac{105}{100}+\frac{36}{100}\right):\frac{84}{25}:\frac{46}{16}\)
\(B=\frac{141}{100}:\frac{84}{25}:\frac{46}{16}\)
\(B=\frac{141}{100}\times\frac{25}{84}\times\frac{16}{46}\)
\(B=\frac{141}{4}\times\frac{1}{84}\times\frac{16}{46}\)
\(B=\frac{141}{336}\times\frac{16}{46}\)
\(B=\frac{141}{21}\times\frac{1}{46}\)
\(B=\frac{141}{966}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 27 . 75 + 25 .27 - 150 = 27 . (75 + 25) - 150
= 270 . 100 - 150
= 27 000 - 150
= 26 850
b) 3.52 - 16 : 22 = 12,25 - 16 : 4
= 12,25 - 4
= 8,25
c) 20 - [30 - (5 - 1)2 ] = 20 - [30 - 42 ]
= 20 - 30 - 16
= (-10) - 16
= -26
d) 60 : {[(12 - 3) . 2] + 2} = 60 : {[9 . 2] + 2}
= 60 : {18 + 2}
= 60 : 20
= 3
\(=\frac{8}{11}.\frac{14}{23}+\frac{8}{11}.\frac{9}{23}-\frac{8}{11}.1\)
\(=\frac{8}{11}.\left(\frac{14}{23}+\frac{9}{23}-1\right)\)
\(=\frac{8}{11}.0=0\)
Ai thấy tớ đúng k nha