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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
?$\frac {16}{9}$?
?$6\frac 67$?
?$=\frac {43}{44}×(44+1)$?
?$=43+\frac {43}{44}$?
?$=43\frac {43}{44}$?
=190-2.4×4
=190-9.6
=180.4
=(3.82+1.18)-(1.54+2.46)
=5-4
=1
=22-18+4
=8
?$=\frac {5}{21}×(\frac {7}{9}÷\frac {11}{18})$?
?$=\frac {5}{21}×\frac {14}{11}$?
?$=\frac {10}{33}$?
?$=\frac {5}{8}×(77+22+1)$?
?$=\frac {5}{8}×100$?
?$=62.5$?
$\begin{aligned}解：\frac {1}{4}x&=\frac {8}{3}\\x&=\frac {32}{3}\end{aligned}$
$\begin{aligned}解：\frac {3}{4}x&=\frac {2}{5}×\frac {5}{6}\\\frac {3}{4}x&=\frac {1}{3}\\x&=\frac {4}{9}\end{aligned}$
$\begin{aligned}解：\frac {2}{3}x+\frac {2}{5}x&=\frac {8}{15}\\\frac {16}{15}x&=\frac {8}{15}\\x&=\frac {1}{2}\end{aligned}$
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