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第61页

信息发布者：

2320

6.37

1.6

$2\frac 1{12}$

$2\frac{2}{7}$

$\frac{4}{9}$

$\frac{1}{3}$

$\frac {14}{15}$

=900-212

=688

=2.5×0.4×1.8

=1×1.8

=1.8

$=\frac {7}{10}+\frac {3}{5}$

$=\frac {13}{10}$

$=\frac {4}{5}×(3.5+5.5+1)$

$=\frac {4}{5}×10$

$=8$

$=(4.56+3.44)-(\frac {4}{7}+\frac {3}{7})$

$=8-1$

$=7$

=9.24÷(1.5×0.2)

=9.24÷0.3

=30.8

$\begin{aligned}解：0.68x&=1.7\\x&=2.5\end{aligned}$

$\begin{aligned}解：\frac {2}{9}x&=10×\frac {4}{5}\\\frac {2}{9}x&=8\\x&=36\end{aligned}$

$\begin{aligned}解：5x+3&=100\\5x&=97\\x&=19.4\end{aligned}$