第67页

信息发布者：
2100
11
7.52
1.3
266
380
​$\frac {7}{12}$​
1
​$\frac {5}{3}$​
​$\frac {40}{3}$​
30
100
=450-103
=347
=5.8+4.4
=10.2
=25×8×0.4×125
=(25×0.4)×(8×125)
=10×1000
=10000
​$ =(\frac {25}{49}+\frac {23}{49})×\frac {1}{12}$​
​$=\frac {48}{49}×\frac {1}{12}$​
​$=\frac {4}{49}$​
​$ =\frac {1}{4}×4×7+\frac {3}{7}×7×4$​
​$=1×7+3×4$​
​$=7+12$​
​$=19$​
​$=\frac {3}{4}÷[\frac {21}{20}×\frac {3}{7}]$​
​$=\frac {3}{4}÷\frac {9}{20}$​
​$=\frac {5}{3}$​
$\begin {aligned}解： \frac {5}{12}x&=\frac {5}{8}\\x &=\frac {3}{2}\end {aligned}$
$\begin {aligned}解： 4x&=\frac {5}{7}×\frac {7}{15}\\4x&=\frac {1}{3}\\x &=\frac {1}{12}\end {aligned}$
$\begin {aligned}解： 0.5x&=5.2-3.5\\0.5x&=1.7\\x &=3.4\end {aligned}$
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