\(x=\dfrac{21}{10}\times\dfrac{2}{7}=\dfrac{7}{5}\)
\(x:\dfrac{2}{7}=\dfrac{21}{10}\)
\(\Leftrightarrow x=\dfrac{21}{10}\times\dfrac{2}{7}\)
\(\Leftrightarrow\dfrac{42}{70}=\dfrac{3}{5}\)
98775 - 32 x 85 / 67500 - 24 x 236 / 568 + 101598 : 287 / 6875 + 980 -180 \(\dfrac{2}{5}+\dfrac{3}{10}-\dfrac{1}{2}\) / \(\dfrac{8}{11}+\dfrac{8}{33}\) x \(\dfrac{3}{4}\) / 7/9 x 3/14 :5/8 / \(\dfrac{5}{12}-\dfrac{7}{32}:\dfrac{21}{16}\)
ÉT O ÉT
\(a.\dfrac{3}{5}\) x \(\dfrac{17}{21}\) \(+ \) \(\dfrac{17}{21}\) x \(\dfrac{2}{5}\)
\(b.(\dfrac{8}{5}+\dfrac{5}{6}):\dfrac{7}{6}\)
\(xx\dfrac{2}{7}x\dfrac{3}{4}=\dfrac{5}{21}\)
a) \(\dfrac{5}{11}\) + \(\dfrac{7}{16}\) x \(\dfrac{8}{21}\) =
b) \(\dfrac{5}{2}\) - \(\dfrac{8}{5}\) : 6 =
Mọi người trình bày nhé
a,\(\dfrac{4}{9}\) : \(\dfrac{3}{10}\)
b,\(\dfrac{3}{7}\) x \(\dfrac{5}{7}\)
c,\(\dfrac{4}{9}\) : \(\dfrac{3}{2}\)
D \(\dfrac{3}{9}\) + \(\dfrac{5}{6}\) x \(\dfrac{2}{3}\)
E \(\dfrac{2}{7}\) x \(\dfrac{4}{3}\) + \(\dfrac{2}{6}\)
G \(\dfrac{4}{7}\) : 2 + \(\dfrac{4}{7}\)
\(\dfrac{2}{3}:\dfrac{7}{5}:\dfrac{x}{9}=\dfrac{2}{7}:\dfrac{3}{5}:\dfrac{10}{9}\)
\(\dfrac{4}{7}\)x\(\dfrac{21}{16}\):\(\dfrac{5}{8}\)
\(\dfrac{4}{7}\)x\(\dfrac{21}{16}\):\(\dfrac{5}{8}\)
bài 1 :
a) \(\dfrac{2}{5}+\dfrac{3}{8}=\) b)\(\dfrac{7}{6}-\dfrac{2}{3}=\) c)\(\dfrac{5}{9}\times6\) d)\(\dfrac{8}{5}:\dfrac{4}{7}=\)
bài 2:
a) \(\dfrac{4}{5}+\) x =\(\dfrac{5}{6}\) b)x : \(\dfrac{7}{10}=5\)
bài 3 : hai xe ô tô chở được tất cả 16 tấn 8 tạ hàng . Xe ô tô thứ nhất chở được nhiều hơn xe ô tô thứ hai 2 tấn 6 tạ hàng . Hỏi mỗi xe chở được bao nhiêu tạ hàng
bài 4 :
145 \(\times\) 69 + 22 x 145 +145 x 8 + 145 =
