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電子課本網(wǎng) › 第61頁

第61頁

信息發(fā)布者：
?$\begin {aligned}&\frac {7}{9}=\frac {14}{18}，\frac {5}{6}=\frac {15}{18}\\&\frac {14}{18}<\frac {15}{18}，\frac {7}{9}<\frac {5}{6}\end {aligned}$?
?$\begin {aligned}&\frac {1}{12}=\frac {4}{48}，\frac {7}{16}=\frac {21}{48}\\&\frac {4}{48}<\frac {21}{48}，\frac {1}{12}<\frac {7}{16}\end {aligned}$?
?$\begin {aligned}&\frac {7}{18}=\frac {14}{36}，\frac {11}{36}=\frac {11}{36}\\&\frac {14}{36}>\frac {11}{36}，\frac {7}{18}>\frac {11}{36}\end {aligned}$?
?$\begin {aligned}&\frac {13}{24}=\frac {39}{72}，\frac {17}{18}=\frac {68}{72}\\&\frac {39}{72}<\frac {68}{72}，\frac {13}{24}<\frac {17}{18}\end {aligned}$?
?$\frac {2}{5}，\frac {4}{9}，\frac {1}{3}，\frac {5}{12}$?
?$\frac {6}{19}$?
?$\frac {3}{4}，\frac {5}{6}，\frac {6}{11}，\frac {7}{10}$?
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B
C
C
C
答：橙汁要多進(jìn)。因為?$ \frac {3}{10}=\frac {18}{60}，$??$\frac {8}{15}=\frac {32}{60}，$??$\frac {7}{12}=\frac {35}{60}，$?
?$\frac {35}{60} >\frac {32}{60} > \frac {18}{60}$?
即?$ \frac {7}{12} > \frac {8}{15} > \frac {3}{10}，$?所以橙汁要多進(jìn)。
小紅：?$\frac {2}{5}$? 
小芳：1-?$\frac {4}{7}$?=?$\frac {3}{7}$? 
小麗：?$\frac {4}{4+6}$?=?$\frac {2}{5}$?
?$\frac {3}{7}$? > ?$\frac {2}{5}$?
答：現(xiàn)在小芳看的頁數(shù)最多。
B
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