第27页

信息发布者：
A
C
A
194
1.8
$\frac{5}{12}$
0.2
$\frac{3}{2}$
$\frac{1}{3}$
​$ =(\frac {16}{5}-\frac {6}{5})×\frac {1}{4}$​
​$=2×\frac {1}{4}$​
​$=\frac {1}{2}$​
=(564-432)÷12
=132÷12
=11
=7.8÷[3.9-1.9-1.35]
=7.8÷[2-1.35]
=7.8÷0.65
=12
$\begin {aligned}解：5x+285&=540\\5x&=255\\x &=51\end {aligned}$
$\begin {aligned}解：\frac {1}{30}x &= \frac {7}{5}\\x &=42\end {aligned}$
$\begin {aligned}解： 1.2x&=3.4×3\\1.2x&=10.2\\x &=8.5\end {aligned}$
1
6
或(7，6)
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