第24页

信息发布者:
$16$
$4$
$4$
​$=100×100$​
​$=10000$​
$\frac{3}{4}$
$\frac{7}{8}$
$\frac{15}{16}$
$\frac{31}{32}$
$1$
$\frac{1}{256}$
$\frac{255}{256}$
​$=\frac {1}{5}+\frac {1}{5}- \frac {1}{10}+\frac {1}{10}-\frac {1}{20}+\frac {1}{20}−\frac {1}{40}+\frac {1}{40}−\frac {1}{80}+\frac {1}{80}−\frac {1}{160}$​
​$=\frac {1}{5}+\frac {1}{5}−\frac {1}{160}$​
​$=\frac {63}{160}$​
​$3.14×5²÷4×2=39.25($​平方厘米​$)$​