8 tháng 5 2022 lúc 13:25
Các câu hỏi tương tự
C=\(\dfrac{7}{19}\times\dfrac{5}{8}\times\dfrac{-19}{7}\)
D=\(\dfrac{3}{7}\times\dfrac{9}{11}+\dfrac{3}{7}\times\dfrac{2}{11}\)
26 tháng 1 2022 lúc 20:28
A = \(\dfrac{-19}{9}\times\dfrac{1}{2}-\dfrac{4}{11}\times\dfrac{-11}{9}+\left(-\dfrac{2}{3}\right)\)
B = \(\left(-\dfrac{15}{6}\right)\div\dfrac{-1}{2}+\dfrac{7}{-12}-\dfrac{1}{3}\times\dfrac{-11}{2}\)
C = \(\dfrac{3}{4}\times\left(-8\right)-\dfrac{1}{3}\times\dfrac{-7}{2}-\dfrac{5}{18}\)
31 tháng 12 2022 lúc 19:00
C dfrac{4}{9}timesdfrac{13}{17}+dfrac{4}{17}timesdfrac{4}{9}+dfrac{2}{9}D dfrac{8}{19}timesdfrac{5}{11}+dfrac{7}{11}timesdfrac{8}{19}+dfrac{12}{11}timesdfrac{11}{19}
Đọc tiếp
C = \(\dfrac{4}{9}\)\(\times\)\(\dfrac{13}{17}\)+\(\dfrac{4}{17}\)\(\times\)\(\dfrac{4}{9}\)+\(\dfrac{2}{9}\)
D = \(\dfrac{8}{19}\)\(\times\)\(\dfrac{5}{11}\)+\(\dfrac{7}{11}\)\(\times\dfrac{8}{19}+\dfrac{12}{11}\times\dfrac{11}{19}\)
31 tháng 12 2022 lúc 19:46
a) dfrac{-2}{15}times xdfrac{-2}{7} b) dfrac{7}{-5}times x-3 c) -dfrac{4}{9}xdfrac{1}{2} d) dfrac{8}{3}div xdfrac{-3}{8} e) xdivdfrac{3}{-4}-12 f) left(-1right)div xdfrac{-3}{7}+dfrac{4}{5} g)dfrac{4}{11}x-dfrac{1}{3}dfrac{2}{5} i) dfrac{-6}{7}-dfrac{1}{5}x-4j) dfrac{1}{2}+dfrac{2}{3}div7dfrac{-1}{3} k) dfrac{-5}{2}+xdiv7dfr...
Đọc tiếp
a) \(\dfrac{-2}{15}\times x=\dfrac{-2}{7}\) b) \(\dfrac{7}{-5}\times x=-3\) c) \(-\dfrac{4}{9}x=\dfrac{1}{2}\) d) \(\dfrac{8}{3}\div x=\dfrac{-3}{8}\)
e) \(x\div\dfrac{3}{-4}=-12\) f) \(\left(-1\right)\div x=\dfrac{-3}{7}+\dfrac{4}{5}\) g)\(\dfrac{4}{11}x-\dfrac{1}{3}=\dfrac{2}{5}\) i) \(\dfrac{-6}{7}-\dfrac{1}{5}x=-4\)
j) \(\dfrac{1}{2}+\dfrac{2}{3}\div7=\dfrac{-1}{3}\) k) \(\dfrac{-5}{2}+x\div7=\dfrac{-1}{3}\) L) \(\dfrac{-3}{2}-\dfrac{1}{4}\div x=-1\)
21 tháng 5 2022 lúc 16:22
\(\dfrac{-5}{7}\times\dfrac{3}{13}-\dfrac{5}{7}\times\dfrac{10}{13}+1\dfrac{5}{7}\)
Tính hợp lí:
g) \(\dfrac{-3}{4}+\dfrac{2}{7}+\dfrac{-1}{4}+\dfrac{3}{5}+\dfrac{5}{7}\)
h) \(\dfrac{7}{19}.\dfrac{8}{11}+\dfrac{7}{19}.\dfrac{3}{11}-\dfrac{12}{19}\)
i) \(19\dfrac{5}{8}:\dfrac{7}{2013}-26\dfrac{5}{8}:\dfrac{7}{2013}\)
k) \(\dfrac{-5}{12}.\dfrac{2}{11}+\dfrac{-5}{12}.\dfrac{9}{11}+\dfrac{5}{12}\)
\(\dfrac{5}{9}\times\dfrac{7}{13}+\dfrac{5}{9}\times\dfrac{8}{13}-\dfrac{5}{13}\times\dfrac{2}{9}\)
\((\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{9}+\dfrac{1}{10})\times x=\dfrac{1}{9}+\dfrac{2}{8}+\dfrac{3}{7}+...+\dfrac{8}{2}+\dfrac{9}{1}\)
\(\dfrac{7}{12}\times\dfrac{2}{3}-\dfrac{5}{3}\times\dfrac{7}{12}+\dfrac{7}{12}\times3\)