\(\frac{7}{8}\)x Y = 3 - \(\frac{1}{2}\)
\(\frac{7}{8}\)x Y = \(\frac{5}{2}\)
Y = \(\frac{20}{7}\)
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BAI4:TIM Y
A Y\(-\frac{3}{4}=6\times\frac{3}{8}\)
BAI4:TINH
C Y\(+\frac{1}{2}\times\frac{1}{3}=\frac{3}{4}\)
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.\(\frac{27}{49}\times\frac{49}{50}\times\frac{15}{51}\times(\frac{5}{10}-\frac{1}{2})\)
\(1\frac{5}{7}\times 2\frac{1}{8}\div 1\frac{3}{5}\)
tính bằng cách thuận tiện nhất
a) \(\frac{3}{5}\times\frac{8}{27}\times\frac{5}{3}\)
b) \(\frac{7}{19}\times\frac{1}{3}\times\frac{7}{19}\times\frac{2}{3}\)
Tính :
a) 3,5 x 2 + 1,25 x 4
b) \(\frac{3}{4}+2\times\left(\frac{1}{2}-\frac{1}{15}\right)\)
c) \(\frac{7}{11}\times\frac{1}{19}+\frac{7}{11}\times\frac{8}{19}-\frac{4}{11}\)
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 )\(\subset\frac{1}{33}+\frac{31}{333}-\frac{341}{3333}\supset\times\subset\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\supset\)
\(\left(\frac{1}{1\times3}+\frac{1}{3\times5}+\frac{1}{5\times7}+\frac{1}{7\times9}+\frac{1}{9\times11}\right)\times y=\frac{2}{3}\)
Tìm y
Tính cách thuận tiện nhất : \(\frac{7}{19}\times\frac{1}{3}+\frac{7}{19}\times\frac{2}{3}\)