第61页

信息发布者：
2320
6.37
52
40
1.6
​$2\frac {1}{12}$​
​$\frac {16}{7}$​
1
​$\frac {4}{9}$​
=900-212
=688
=2.5×0.4×1.8
=1×1.8
=1.8
​$ =\frac {3}{5}×\frac {7}{9}×\frac {3}{2}+\frac {2}{3}×\frac {3}{2}×\frac {3}{5}$​
​$=\frac {7}{15}×\frac {3}{2}+1×\frac {3}{5}$​
​$=\frac {7}{10}+\frac {3}{5}$​
​$=\frac {13}{10}$​
=(3.5+5.5+1)×0.8
=10×0.8
=8
​$ =(4.56+3.44)-(\frac 47+\frac 37)$​
​$=8-1$​
​$=7$​
=9.24÷[1.5×0.2]
=9.24÷0.3
=30.8
$\begin {aligned}解： 0.68x&=1.7\\x &=2.5\end {aligned}$
$\begin {aligned}解： \frac {2}{9}x&=10×\frac {4}{5}\\\frac {2}{9}x&=8\\x &=36\end {aligned}$
$\begin {aligned}解： 3+5x&=100\\5x&=97\\x &=19.4\end {aligned}$
4360
3.1
18
16
75
0.75
80
​$\frac {5}{4}$​
80050
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