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第13頁

信息發(fā)布者：
$\frac{4}{9}$
$\frac{3}{10}$
$\frac{13}{8}$
$\frac{18}{35}$
1
1
$\frac{3}{8}$
$\frac{1}{30}$
$\frac{9}{10}$
1
解?$：x=\frac {3}{8}+\frac {5}{6}$?
?$x=\frac {9}{24}+\frac {20}{24}$?
?$ x = \frac {29}{24}$?
解?$：x=2.5×12$?
$x = 30$
解?$：6x-1.2=10.8$?
?$6x=12$?
$x = 2$
?$=\frac {16}{18}-\frac {15}{18}+\frac {12}{18}$?
?$=\frac {1}{18}+\frac {12}{18}$?
?$= \frac {13}{18}$?
?$=\frac {5}{8}+\frac {3}{8}-\frac {1}{3}$?
?$=1-\frac {1}{3}$?
?$= \frac {2}{3}$?
?$=(\frac {8}{9}+\frac {1}{9})-(\frac {5}{7}+\frac {1}{7})$?
?$=1-\frac {6}{7}$?
?$= \frac {1}{7}$?
?$=\frac {7}{11}+\frac {4}{11}-\frac {2}{5}$?
?$=1-\frac {2}{5}$?
?$= \frac {3}{5}$?
?$=(\frac {6}{5}+\frac {4}{5})+(\frac {5}{7}+\frac {2}{7})$?
?$=2+1$?
?$= 3$?
?$=\frac {5}{3}-(\frac {4}{9}+\frac {5}{9})$?
?$=\frac {5}{3}-1$?
= $\frac{2}{3}$
3
15
24
0.67
3
4
2
$\frac{1}{6}$
7
$\frac{3}{10}$
$\frac{3}{4}$
$\frac{1}{8}$
$\frac{2}{3}$
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