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第20頁

信息發(fā)布者：
C
D
$\frac{1}{6}$
1
$\frac{9}{8}$
$\frac{13}{6}$
$\frac{2}{5}$
解?$：0.4x-6=26$?
?$0.4x=32$?
?$ x = 80$?
解?$：x+\frac {1}{9}=1$?
?$x=1-\frac {1}{9}$?
?$x=\frac {8}{9}$?
解?$：2.5x=10$?
$x = 4$
?$=\frac {10}{12}-\frac {9}{12}+\frac {4}{12}$?
?$=\frac {1}{12}+\frac {4}{12}$?
?$= \frac {5}{12}$?
?$=7-(\frac {7}{19}+\frac {12}{19})$?
?$=7-1$?
?$= 6$?
?$=\frac {4}{3}-(\frac {19}{18}-\frac {1}{9})$?
?$=\frac {4}{3}-\frac {17}{18}$?
?$=\frac {24}{18}-\frac {17}{18}$?
?$= \frac {7}{18}$?
?$=(\frac {7}{11}+\frac {15}{11})-(\frac {2}{15}+\frac {8}{15})$?
?$=2-\frac {2}{3}$?
?$= \frac {4}{3}$?
?$=\frac {12}{5}-\frac {1}{5}-\frac {4}{5}$?
?$=\frac {12}{5}-(\frac {1}{5}+\frac {4}{5})$?
?$=\frac {12}{5}-1$?
?$=\frac {7}{5}$?
?$=(14.5-4.5)+(\frac {5}{8}+\frac {7}{8})$?
?$=10+1\frac {1}{2}$?
?$=11\frac {1}{2}$?
9
25
0.6
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