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第61页

信息发布者：

2320

6.37

1.6

$2\frac {1}{12}$

$\frac {16}{7}$

$\frac {4}{9}$

=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

$ =(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

0.75

$\frac {5}{4}$

80050

平方米

平方分米