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第70頁(yè)

信息發(fā)布者：
?$ \frac {3}{2}$?
?$ \frac {2}{7}$?
20
?$ \frac {1}{2}$?
?$ \frac {3}{8}$?
?$ \frac {1}{6}$?
?$ \frac {15}{2}$?
0
?$10 ×\frac {4}{5} ×\frac {5}{8}=5($?噸?$)$?
?$36 ×\frac {2}{3} ×\frac {3}{4}=18( $?個(gè)?$)$?
解：?$\frac {5}{6}x=\frac {1}{4}$?
?$x=\frac {3}{10}$?
解：?$\frac {2}{9}x=\frac {2}{15}$?
?$x=\frac {3}{5}$?
解：?$\frac {3}{5}x=30$?
?$x=50$?
?$=\frac {2}{13}×(\frac {7}{5}-\frac {2}{5})$?
?$=\frac {2}{13}×1$?
?$=\frac {2}{13}$?
?$=24×(1-\frac {18}{19})$?
?$=24×\frac {1}{19}$?
?$=\frac {24}{19}$?
?$=\frac {5}{7}×(4+\frac {4}{3})$?
?$=\frac {5}{7}×\frac {16}{3}$?
?$=\frac {80}{21}$?
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