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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

$\frac {16}{9}$

$6\frac {6}{7}$

$ =\frac {43}{44}×44+\frac {43}{44}$

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

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

=190-2.4×4

=190-9.6

=180.4

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

=5-4

$ =\frac {11}{12}×24-\frac {3}{4}×24+\frac {1}{6}×24$

$=22-18+4$

$=4+4$

$=8$

$=\frac {5}{21}×[\frac {7}{9}÷\frac {11}{18}]$

$=\frac {5}{21}×\frac {14}{11}$

$=\frac {10}{33}$

=(77+22+1)×0.625

=100×0.625

=62.5

$\begin {aligned}解： \frac {1}{4}x&=\frac {2}{3}+2\\\frac {1}{4}x&=\frac {8}{3}\\x &=\frac {32}{3}\end {aligned}$

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

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