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第43页

信息发布者：

405

23.8

9.2

1.98

310

$\frac {4}{81}$

2.7

7.05

1.2

$\frac {16}{9}$

$6\frac 67$

$=\frac {43}{44}×(44+1)$

$=43+\frac {43}{44}$

$=43\frac {43}{44}$

=190-2.4×4

=190-9.6

=180.4

=(3.82+1.18)-(1.54+2.46)

=5-4

=22-18+4

$=\frac {5}{21}×(\frac {7}{9}÷\frac {11}{18})$

$=\frac {5}{21}×\frac {14}{11}$

$=\frac {10}{33}$

$=\frac {5}{8}×(77+22+1)$

$=\frac {5}{8}×100$

$=62.5$

$\begin{aligned}解：\frac {1}{4}x&=\frac {8}{3}\\x&=\frac {32}{3}\end{aligned}$

$\begin{aligned}解：\frac {3}{4}x&=\frac {2}{5}×\frac {5}{6}\\\frac {3}{4}x&=\frac {1}{3}\\x&=\frac {4}{9}\end{aligned}$

$\begin{aligned}解：\frac {2}{3}x+\frac {2}{5}x&=\frac {8}{15}\\\frac {16}{15}x&=\frac {8}{15}\\x&=\frac {1}{2}\end{aligned}$