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11 tháng 5 2018

\(A=-1,6:\left(1+\frac{2}{3}\right)\)

\(A=\frac{-8}{5}:\frac{5}{3}\)

\(A=\frac{-24}{25}\)

\(B=1,4.\frac{15}{29}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)

\(B=\frac{7}{5}.\frac{15}{29}-\frac{22}{15}:\frac{11}{5}\)

\(B=\frac{21}{29}-\frac{22}{15}.\frac{5}{11}\)

\(B=\frac{21}{29}-\frac{2}{3}\)

\(B=\frac{5}{87}\)

11 tháng 5 2018

cảm ơn bn bn giải giùm mình mấy bài mình mới đăng nx ik

12 tháng 5 2018

\(A=-1,6:\left(1+\frac{2}{3}\right)\)

\(A=\frac{-8}{5}:\frac{5}{3}=-\frac{8}{5}.\frac{3}{5}=\frac{-24}{25}\)

12 tháng 5 2018

\(B=\frac{7}{5}.\frac{15}{29}-\left(\frac{4}{5}+\frac{2}{3}\right):\frac{11}{5}\)

\(B=\frac{21}{29}-\left(\frac{12}{15}+\frac{10}{15}\right).\frac{5}{11}=\frac{21}{29}-\frac{22}{15}.\frac{5}{11}=\frac{21}{29}-\frac{2}{3}\)

\(B=\frac{63}{87}-\frac{58}{87}=\frac{5}{87}\)

25 tháng 4 2017

A= -8/5: (1+2/3)

 = -8/5:5/3

 = -8/5.3/5

 = -24/25

B= 7/5.15/49-22/15: 11/5

 = 3/7-2/5

 = 1/35

25 tháng 4 2017

\(A=-1,6:\left(1+\frac{2}{3}\right)\)

\(A=-1,6:\frac{5}{3}\)

\(A=-\frac{24}{25}\)

\(B=1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)

\(B=\frac{135}{98}-\frac{2}{3}\)

\(B=\frac{209}{294}\)

17 tháng 4 2017

\(A=-1,6:\left(1+\dfrac{2}{3}\right)\)

\(A=\dfrac{-16}{10}:\dfrac{5}{3}\)

\(A=\dfrac{-8}{5}.\dfrac{3}{5}\)

\(A=\dfrac{-24}{25}\)

\(B=1,4.\dfrac{15}{49}-\left(\dfrac{4}{5}+\dfrac{2}{3}\right):2\dfrac{1}{5}\)

\(B=\dfrac{14}{10}.\dfrac{15}{49}-\left(\dfrac{4}{5}+\dfrac{2}{3}\right):\dfrac{11}{5}\)

\(B=\dfrac{14}{10}.\dfrac{15}{49}-\dfrac{22}{15}:\dfrac{11}{5}\)

\(B=\dfrac{3}{7}-\dfrac{22}{15}:\dfrac{11}{5}\)

\(B=\dfrac{3}{7}-\dfrac{2}{3}\)

\(B=\dfrac{-5}{21}\)

17 tháng 4 2017

\(A=-1,6:\left(1+\dfrac{2}{3}\right)\)
\(A=\dfrac{-8}{5}:\left(1+\dfrac{2}{3}\right)\)
\(A=\dfrac{-8}{5}:\dfrac{5}{3}\)
\(A=\dfrac{-24}{25}\)

\(B=1,4.\dfrac{15}{49}-\left(\dfrac{4}{5}+\dfrac{2}{3}\right):2\dfrac{1}{5}\)
\(B=\dfrac{7}{5}.\dfrac{15}{49}-\left(\dfrac{4}{5}+\dfrac{2}{3}\right):\dfrac{11}{5}\)
\(B=\dfrac{7}{5}.\dfrac{15}{49}-\dfrac{22}{15}:\dfrac{11}{5}\)
\(B=\dfrac{3}{7}-\dfrac{2}{3}\)
\(B=\dfrac{-5}{21}\)

13 tháng 7 2017

\(A=\frac{16}{10}:\frac{4}{3}=\frac{16}{10}\cdot\frac{3}{4}=\frac{6}{5}\)

\(B=\frac{14}{10}\cdot\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):\frac{11}{5}\)

\(B=\frac{3}{7}-\frac{22}{15}:\frac{11}{5}\)\(=\frac{3}{7}-\frac{2}{3}\)\(=\frac{-5}{21}\)

14 tháng 7 2017

a. A= \(\frac{16}{10}:\frac{4}{3}=\frac{16}{10}.\frac{3}{4}=\frac{6}{5}\)

b. B= \(\frac{14}{10}.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):\frac{11}{5}=\frac{3}{7}-\frac{22}{15}:\frac{11}{5}=\frac{3}{7}-\frac{2}{3}=\frac{-5}{21}\)

A=-1/10

B câu b có và 1/5 là sao pn

22 tháng 3 2019

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

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

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

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

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

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

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

22 tháng 3 2019

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

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

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

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

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

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

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

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

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