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第77頁(yè)

信息發(fā)布者：
?$\frac {8}{21}$?
?$\frac {35}{36}$?
?$\frac {4}{5}$?
?$\frac {2}{7}$?
?$\frac {5}{7}$?
?$\frac {3}{20}$?
>
>
$\begin {aligned}解：x&=\frac {1}{6}+\frac {1}{5}\\x &=\frac {11}{30}\end {aligned}$
$\begin {aligned}解：x&=\frac {11}{9}-1\\x &=\frac {2}{9}\end {aligned}$
?=$1+\frac {4}{11}$?
?$=1 \frac {4}{11}$?
=1-1
=0
A
D
C
?$\frac {4}{5}$? + ?$\frac {4}{5}$? + ?$\frac {3}{8}$?=?$\frac {79}{40}$? (厘米)
答：它的周長(zhǎng)是?$\frac {79}{40}$?厘米。
?$\frac {5}{6}$?-?$\frac {1}{5}$? -?$\frac {1}{5}$?=?$\frac {13}{30}$? (千克)
答：乙瓶原來有飲料?$\frac {13}{30}$?千克。
4÷12=?$\frac {1}{3}$? 
5÷9=?$\frac {5}{9}$? 
1- ?$\frac {1}{3}$? -?$\frac {5}{9}$?=?$\frac {1}{9}$?
答：還剩下這瓶果汁的?$\frac {1}{9}。$?
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