\(=\dfrac{12}{7}.\dfrac{17}{8}:\dfrac{8}{5}=\dfrac{12.17.5}{7.8.8}=\dfrac{255}{112}\)
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tính bằng cách thuận tiện
a. \(\frac{1}{2}\times\frac{2}{3}\div\frac{4}{3}\times\frac{4}{5}\div\frac{6}{5}\times\frac{6}{7}\div\frac{7}{8}\times\frac{8}{9}\div\frac{10}{9}\)
b.\(\frac{27}{49}\times\frac{49}{50}\times\frac{15}{51}\times(\frac{5}{10}-\frac{1}{2})\)
\(\frac{6\div\frac{3}{5}-1\frac{1}{6}\times\frac{6}{7}}{4\frac{1}{5}\times\frac{10}{11}+5\frac{2}{11}}\)
\(\frac{6\div\frac{3}{5}-1\frac{1}{6}\times\frac{6}{7}}{4\frac{1}{5}\times\frac{10}{11}+5\frac{2}{11}}=?\)
\(\frac{6\div\frac{3}{5}-1\frac{1}{6}\times\frac{6}{7}}{4\frac{1}{5}\times\frac{10}{11}+5\frac{2}{11}}\)
Tính nhanh:
A=\(\left(\frac{2}{5}+\frac{2}{9}+\frac{2}{11}\div\frac{7}{5}+\frac{7}{9}+\frac{7}{11}\right)\div\left(\frac{1}{3}-\frac{1}{4}+\frac{1}{5}\div\frac{7}{6}-\frac{7}{8}+\frac{7}{10}\right)\)
a ) frac{5}{6}-frac{26}{5}timesfrac{1}{13}b ) subsetfrac{19}{23}-frac{22}{46}supsettimesfrac{23}{16}c ) frac{25}{8}timesfrac{14}{30} d ) subsetfrac{3}{4}timesfrac{5}{7}supsettimessubsetfrac{20}{9}timesfrac{14}{15}supsete ) frac{4}{35}timesfrac{25}{32}timesfrac{38}{24} g ) frac{1}{2}timesfrac{3}{4}timesfrac{2}{3}timesfrac{4}{5} h ) frac{5}{6}timesfrac{11}{4}-frac{5}{4}timesfrac{23}{6}i ) frac{9}{16}timesfrac{13}{4}-frac{9}{4}timesfrac{5}{16}+frac{9}{16}timesfrac{17}{4}k ) subset7timesfrac{1}{3}su...
Đọc tiếp
a ) \(\frac{5}{6}-\frac{26}{5}\times\frac{1}{13}\)
b ) \(\subset\frac{19}{23}-\frac{22}{46}\supset\times\frac{23}{16}\)
c ) \(\frac{25}{8}\times\frac{14}{30}\)
d ) \(\subset\frac{3}{4}\times\frac{5}{7}\supset\times\subset\frac{20}{9}\times\frac{14}{15}\supset\)
e ) \(\frac{4}{35}\times\frac{25}{32}\times\frac{38}{24}\)
g ) \(\frac{1}{2}\times\frac{3}{4}\times\frac{2}{3}\times\frac{4}{5}\)
h ) \(\frac{5}{6}\times\frac{11}{4}-\frac{5}{4}\times\frac{23}{6}\)
i ) \(\frac{9}{16}\times\frac{13}{4}-\frac{9}{4}\times\frac{5}{16}+\frac{9}{16}\times\frac{17}{4}\)
k ) \(\subset7\times\frac{1}{3}\supset\times\subset\frac{1}{7}\times6\supset\)
m ) \(\frac{2}{3}\times\subset\frac{3}{5}+\frac{3}{7}\supset\)
n ) \(\frac{4}{5}\times\subset\frac{5}{8}+\frac{7}{4}\supset\)
p )\(\subset\frac{1}{33}+\frac{31}{333}-\frac{341}{3333}\supset\times\subset\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\supset\)
tính nhanh:
\(\frac{10-1\frac{1}{6}\times\frac{6}{7}}{21\div\frac{11}{2}+5\frac{2}{12}}\)
tính bằng cách thuận tiện nhất
a) \(\frac{3}{5}\times\frac{8}{27}\times\frac{5}{3}\)
b) \(\frac{7}{19}\times\frac{1}{3}\times\frac{7}{19}\times\frac{2}{3}\)
9\(\frac{1}{5}\): 4\(\frac{3}{5}\)=.........
6\(\frac{1}{7}\)\(\times\)1\(\frac{6}{43}\)= .......
8\(\frac{1}{3}\)\(\div\)4\(\frac{3}{5}\)=.........
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