\(=\frac{8}{11}.\frac{14}{23}+\frac{8}{11}.\frac{9}{23}-\frac{8}{11}.1\)

\(=\frac{8}{11}.\left(\frac{14}{23}+\frac{9}{23}-1\right)\)

\(=\frac{8}{11}.0=0\)

Ai thấy tớ đúng k nha

\(\frac{1}{8}\div\frac{27}{-20}+\left(75\%-\frac{5}{16}\right)\div\frac{7}{2}\)

\(=\frac{1}{8}\times\frac{-20}{27}+\left(\frac{75}{100}-\frac{5}{16}\right)\times\frac{2}{7}\)

\(=\frac{-10}{108}+\left(\frac{12}{16}-\frac{5}{16}\right)\times\frac{2}{7}\)

\(=\frac{-5}{54}+\frac{7}{16}\times\frac{2}{7}\)

\(=\frac{-5}{54}+\frac{2}{16}\)

\(=\frac{-5}{54}+\frac{1}{8}\)

\(=\frac{-20}{216}+\frac{27}{216}\)

\(=\frac{7}{216}\)

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%\(-\frac{5}{16}):3\frac{1}{2}\)

=\(\frac{9}{5}.\frac{-20}{27}+(\frac{3}{4}-\frac{5}{16}):\frac{7}{2}\)

=\(\frac{-4}{3}+\frac{1}{8}\)

=\(\frac{-29}{24}\)

kệ bãn đi mọi người

để làm giùm cho

mà tui làm sợ sai lắm

dùng  máy tính nha b

chúc hok tốt

mình bắt đầu thấy loạn rồi đấy

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) \(1,8:\dfrac{27}{-20}+\left(75\%-\dfrac{5}{16}\right):3\dfrac{1}{2}\\ =\dfrac{9}{5}:\dfrac{-27}{20}+\left(\dfrac{3}{4}-\dfrac{5}{16}\right):\dfrac{7}{2}\\ =\dfrac{9}{5}.\dfrac{-20}{27}+\left(\dfrac{12}{16}-\dfrac{5}{16}\right):\dfrac{7}{2}\\ =\dfrac{-4}{3}+\dfrac{7}{16}:\dfrac{7}{2}\\ =\dfrac{-4}{3}+\dfrac{7}{16}.\dfrac{2}{7}\\ =\dfrac{-4}{3}+\dfrac{1}{8}\\ =\dfrac{-32}{24}+\dfrac{3}{24}\\ =\dfrac{-29}{24}\)

\(a.27.75+25.27-150\)

\(=27.\left(75+25\right)-150\)

\(=27.100-150\)

\(=2700-150\)

\(=2550\)

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

a: \(=3\sqrt{3}-2\sqrt{3}+4\sqrt{3}-5\sqrt{3}=2\sqrt{3}\)

\(A=\left(\frac{21}{5}-\frac{3}{5}\right):\frac{16}{8}:\frac{9}{10}\)

\(A=\frac{18}{5}:\frac{16}{8}:\frac{9}{10}\)

\(A=\frac{18}{5}\times\frac{8}{16}\times\frac{10}{9}\)

\(A=\frac{9}{5}\times\frac{8}{8}\times\frac{10}{9}\)

\(A=\frac{72}{40}\times\frac{10}{9}\)

\(A=\frac{8}{4}\times\frac{1}{1}\)

\(A=\frac{8}{9}\)

\(B=\left(1\frac{1}{20}+\frac{36}{100}\right):\frac{84}{25}:\left(2+\frac{14}{16}\right)\)

\(B=\left(\frac{21}{20}+\frac{36}{100}\right):\frac{84}{25}:\left(\frac{32}{16}+\frac{14}{16}\right)\)

\(B=\left(\frac{105}{100}+\frac{36}{100}\right):\frac{84}{25}:\frac{46}{16}\)

\(B=\frac{141}{100}:\frac{84}{25}:\frac{46}{16}\)

\(B=\frac{141}{100}\times\frac{25}{84}\times\frac{16}{46}\)

\(B=\frac{141}{4}\times\frac{1}{84}\times\frac{16}{46}\)

\(B=\frac{141}{336}\times\frac{16}{46}\)

\(B=\frac{141}{21}\times\frac{1}{46}\)

\(B=\frac{141}{966}\)