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電子課本網(wǎng) 第2頁(yè)

第2頁(yè)

信息發(fā)布者:
50
24
12
14.4

64
$12n + 4$
84
$\frac{9}{20}$
?$ \frac {10}{9}$?
$\frac{7}{10}$
6
0.125
14.5
?$ \frac 65$?
69
$\frac{15}{16}$
$\begin {aligned}解: \frac {5}{9}x&=6\\x &=\frac {54}{5}\end {aligned}$
$\begin {aligned}解: 3x&=\frac {1}{5}×8\\3x&=\frac {8}{5}\\x &=\frac {8}{15}\end {aligned}$
$\begin {aligned}解: x &= \frac {4}{17}×8\\x &=\frac {32}{17}\end {aligned}$