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第43頁

信息發(fā)布者：
405
23.8
9.2
1.98
310
18
?$\frac {4}{81}$?
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}$?
=190-2.4×4
=190-9.6
=180.4
=(3.82+1.18)-(1.54+2.46)
=5-4
=1
?$ =\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
$\begin {aligned}解： \frac {1}{4}x&=\frac {2}{3}+2\\\frac {1}{4}x&=\frac {8}{3}\\x &=\frac {32}{3}\end {aligned}$
$\begin {aligned}解：\frac {3}{4}x&=\frac {2}{5}×\frac {5}{6}\\\frac {3}{4}x&=\frac {1}{3}\\x &=\frac {4}{9}\end {aligned}$
$\begin {aligned}解：\frac {2}{3}x+\frac {2}{5}x&=\frac {8}{15}\\\frac {16}{15}x&=\frac {8}{15}\\x &=\frac {1}{2}\end {aligned}$
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