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第7頁

信息發(fā)布者：
79
21.22
0.0058
0.09
$\frac{17}{15}$
$\frac{8}{3}$
7.5
49
=650-432÷18
=650-24
=626
=3.84-0.38-1.62
=3.84-(0.38+1.62)
=1.84
?$ =\frac {1}{4}×(\frac {1}{8}+\frac {7}{8})$?
?$=\frac {1}{4}×1$?
?$=\frac {1}{4}$?
?$=\frac {8}{9}×[\frac {7}{10}×\frac {3}{4}]$?
?$=\frac {8}{9}×\frac {21}{40}$?
?$=\frac {7}{15}$?
$\begin {aligned}解：4x&=16+0.8\\4x&=16.8\\x &=4.2\end {aligned}$
$\begin {aligned}解： \frac {7}{4}x&=\frac {5}{14}\\x &=\frac {10}{49}\end {aligned}$
$\begin {aligned}解： \frac {5}{8}x&=\frac {4}{3}×10\\\frac {5}{8}x&=\frac {40}{3}\\x &=\frac {64}{3}\end {aligned}$
3600390
360
390
18
12
75
0.75
5
$\frac{7}{2}$
$a - \frac{3}{4}$
$\frac{1}{4}a$
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