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電子課本網(wǎng) › 第35頁

第35頁

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?$\frac {1}{5}$?
1
2
?$\frac{3}{32}$?
?$\frac{1}{10}$?
?$\frac{1}{1000}$?
?$\frac{1}{7}$?
?$\frac {1}{48}$?
?$\frac {7}{80}$?
?$\frac{16}{7}$?
?$\frac {75}{16}$?
?$\frac{7}{5}$?
D
?$\frac{54}{5}÷24=\frac{9}{20}(克)$?
?$\frac {9}{20}×3=\frac {27}{20}(克)$?
?$答：則3盆吊蘭一共能吸收\frac {27}{20}克甲醛。$?
?$\frac{84}{5}$?
?$\frac{10}{7}$?
?$\frac{1}{26}\ $?
?$\frac{4}{3}-\frac{3}{4}=\frac{7}{12}\ $?
?$\frac{5}{4}-\frac{4}{5}=\frac{9}{20}\ $?
?$\frac{6}{5}-\frac{5}{6}=\frac{11}{30}\ $?
?$\frac{9}{8}一 \frac{8}{9}=\frac{17}{72}\ $?
?$\frac{17}{72}＜\frac{11}{30}＜\frac{9}{20}＜\frac{7}{12}，$?
?$最大的差是\frac{7}{12}。$?
?$\frac{7}{12}÷4=\frac{7}{48}\ $?

?$\frac{24}{25}÷2=\frac{12}{25}(千米)$?
?$\ \frac{12}{25}÷3=\frac{4}{25}(千米) $?
?$答：平均每天挖\frac {4}{25}千米。$?
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