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第58頁

信息發(fā)布者：
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√
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3
?$\frac {1}{6}$?
?$\frac {1}{8}，\frac {3}{8}，\frac {5}{8}，\frac {7}{8}$?
?$\frac {8}{1}，\frac {8}{3}，\frac {8}{5}，\frac {8}{7}$?
?$\frac {1}{4}$?
?$\frac {1}{3}$?
?$\frac {3}{10}$?
?$\frac {2}{5}$?
?$\frac {1}{40}$?
?$\frac {1}{11}$?
?$\frac {5}{7}$?
?$\frac {10}{3}$?
B
C
C
52÷80=?$\frac {52}{80}$?、?$\frac {52}{80}$?=?$\frac {13}{20}$? 
28÷80=?$\frac {28}{80}$?、?$\frac {28}{80}$?=?$\frac {7}{20}$?
答：已傳輸?shù)恼?$\frac {13}{20}，$?未傳輸?shù)恼?$\frac {7}{20}。$?
?$\frac {90}{120}$?
?$72÷(29-5)=3 $?
?$\frac {5}{29}$?=?$\frac {5×3}{29×3}$?=?$\frac {15}{87}$?
答：這個分數(shù)原來是?$\frac {15}{87}。$?
答：加上和減去的這個數(shù)是5。
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