第70页 - 苏教版六年级数学同步练习答案（上下册）

$1\frac{1}{2}$

$\frac{2}{7}$

20

$\frac{1}{2}$

$\frac{3}{8}$

$\frac{1}{6}$

$7\frac{1}{2}$

0

$10 ×\frac {4}{5} ×\frac {5}{8}=5($吨$)$

$36 ×\frac {2}{3} ×\frac {3}{4}=18( $个$)$

$=(\frac {7}{13}-\frac {2}{13}) ×\frac {2}{5}$

$=\frac {5}{13} ×\frac {2}{5}$

$=\frac {2}{13}$

$=24 ×(1-\frac {18}{19})$

$=24 ×\frac {1}{19}$

$=\frac {24}{19}$

$=\frac {5}{7} ×4+\frac {5}{7} ×\frac {4}{3}$

$=\frac {5}{7} ×(4+\frac {4}{3})$

$=\frac {5}{7} ×\frac {16}{3}$

$=\frac {80}{21}$

$\begin {aligned}解：\frac {5}{6}x&=\frac {1}{4}\\x &=\frac {3}{10}\end {aligned}$

$\begin {aligned}解：\frac {2}{9}x&=\frac {2}{15}\\x &=\frac {3}{5}\end {aligned}$

$\begin {aligned}解：\frac {3}{5}x&=50-20\\\frac {3}{5}x&=30\\x &=50\end {aligned}$