Các câu hỏi tương tự
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.\(\frac{27}{49}\times\frac{49}{50}\times\frac{15}{51}\times(\frac{5}{10}-\frac{1}{2})\)
\(\frac{2}{3}+\frac{6}{5}+\frac{9}{10}+\frac{14}{15}+\frac{20}{21}+\frac{27}{28}+\frac{35}{36}+\frac{44}{45}+\frac{44}{55}\)
\(A=5,3:\left(5\frac{5}{28}-2\frac{13}{36}+1\frac{16}{63}\right)\)
\(B=\left(\frac{19}{10}\times\frac{19}{10}+\frac{39}{2}:\frac{13}{3}\right)\times\left(\frac{62}{75}-\frac{12}{75}\right)\)
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
a)\(\frac{11}{15}+\frac{5}{7}+\frac{2}{7}+\frac{4}{15}\)
b)\(\frac{5}{9}x\frac{1}{2}x\frac{5}{9}x\frac{6}{4}\)
c)\(\frac{7}{8}:\frac{1}{2}+\frac{9}{8}:\frac{1}{2}\)
d)\(\frac{17}{10}+\frac{1}{2}-\frac{7}{10}\)
tính nhanh
\(a,\frac{11}{15}+\frac{5}{7}+\frac{2}{7}+\frac{4}{15}\)
\(b,\frac{5}{9}x\frac{1}{2}+\frac{5}{9}x\frac{6}{4}\)
\(c,\frac{7}{8}:\frac{1}{2}+\frac{9}{8}:\frac{1}{2}\)
\(d,\frac{17}{10}+\frac{1}{2}-\frac{7}{10}\)
Tính nhanh
a)\(\frac{11}{15}+\frac{5}{7}+\frac{2}{7}+\frac{4}{15}\)
b)\(\frac{5}{9}x\frac{1}{2}+\frac{5}{9}x\frac{6}{4}\)
c)\(\frac{7}{8}:\frac{1}{2}+\frac{9}{8}:\frac{1}{2}\)
d)\(\frac{17}{10}+\frac{1}{2}-\frac{7}{10}\)
\(\frac{1}{7}+\frac{1}{8}+\frac{1}{9}+\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+\frac{1}{14}+\frac{1}{15}+\frac{1}{18}+\frac{1}{22}+\frac{1}{24}+\frac{1}{28}+\frac{1}{33}\)
Tính
\(45\times\frac{-5}{7}+9\times5+\frac{8}{9}+5\times9+45\times\frac{52}{63}\)