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電子課本網(wǎng) › 第31頁

第31頁

信息發(fā)布者：
?$=\frac {1}{4}+\frac {3}{4}+\frac {8}{9}$?
?$=1+\frac {8}{9}$?
?$=1 \frac {8}{9}$?
?$=\frac {1}{18}×(\frac {7}{9}+\frac {2}{9})$?
?$=\frac {1}{18}×1$?
?$=\frac {1}{18}$?
?$=\frac {1}{5}+5$?
?$=5 \frac {1}{5}$?
?$=\frac {7}{8}×(\frac {10}{9}-1)$?
?$=\frac {7}{8}×\frac {1}{9}$?
?$=\frac {7}{72}$?
=10+3-4
=9
?$=\frac {16}{17}×(\frac {23}{25}+\frac {11}{25})$?
?$=\frac {16}{17}×\frac {34}{25}$?
?$=\frac {32}{25}$?
?$400×(1+\frac {1}{4})= 500($?臺(tái)?$)$?
?$120×(1-\frac {1}{5}-\frac {1}{3})=56($?頁?$)$?
?$500×\frac {1}{5}$?
?$500× (\frac {1}{4}+\frac {1}{5})$?
?$500× (1-\frac {1}{4}-\frac {1}{5})$?
?$240×(1-\frac {5}{8})=90($?棵?$)$?
答：蘋果樹有?$90$?棵。
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