\(=\left(\dfrac{2}{3}-\dfrac{3}{4}+\dfrac{5}{6}\right):\left(\dfrac{3}{2}-\dfrac{4}{3}-\dfrac{5}{4}\right)\)
\(=\dfrac{8-9+10}{12}:\dfrac{9-8-10}{12}\)
\(=\dfrac{9}{-11}=-\dfrac{9}{11}\)
rút gọn phân số
\(\dfrac{-8}{12}\)
\(\dfrac{15}{-60}\)
\(\dfrac{-16}{-72}\)
\(\dfrac{35}{14.15}\)
tìm x biết :
1+\(\dfrac{-1}{60}\)+\(\dfrac{19}{120}\)<\(\dfrac{x}{36}\)<\(\dfrac{58}{90}\)+\(\dfrac{59}{72}\)+\(\dfrac{-1}{60}\)
Rút gọn phân số :
\(\dfrac{-351}{702}=\)
\(\dfrac{-18181818}{19191919}=\)
\(\dfrac{583}{-352}=\)
\(\dfrac{115.\left(-30\right).49}{\left(-60\right).115.49}=\)
\(So\) \(sánh:\)
\(a\)) \(\dfrac{14}{21}\) \(và\) \(\dfrac{60}{72}\) \(b\)) \(\dfrac{38}{133}\) \(và\) \(\dfrac{129}{344}\)
tính hợp lý
\(\dfrac{3}{7}.\left(-\dfrac{2}{5}\right).2\dfrac{1}{3}.20.\dfrac{19}{72}\)
Bài 4: So sánh:
a. \(\dfrac{2}{3}\)và\(\dfrac{1}{4}\)
b. \(\dfrac{7}{10}\)và\(\dfrac{7}{8}\)
c. \(\dfrac{6}{7}\)và\(\dfrac{3}{5}\)
d. \(\dfrac{14}{21}\)và\(\dfrac{60}{72}\)
\(d,\dfrac{3}{7}.\left(-\dfrac{2}{5}\right).2\dfrac{1}{3}.20.\dfrac{19}{72}\)
tính hợp lí: \(\dfrac{3}{7}.\left(-\dfrac{2}{5}\right).2\dfrac{1}{3}.20.\dfrac{19}{72}\)
Mọi người giúp mình với
tìm x biết \(\dfrac{-1}{8}< \dfrac{x}{72}\le\dfrac{-1}{36}\left(vớix\in z\right)\)
\(\dfrac{99}{100}:\left(\dfrac{1}{4}-\dfrac{1}{12}+\dfrac{1}{3}\right)-\left(\dfrac{-7}{5}\right)^2\)
\(\dfrac{13}{15}\cdot0,25\cdot3+\left(\dfrac{8}{15}-1\dfrac{19}{60}\right):1\dfrac{23}{24}\)
