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<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><meta name="GENERATOR" content="Microsoft FrontPage 4.0"><meta name="ProgId" content="FrontPage.Editor.Document"><title>第四章 计算机算术</title><meta name="Microsoft Theme" content="arcs 001"></head><body background="arctile.jpg" bgcolor="#FFFFFF" text="#000000" link="#3399FF" vlink="#666666" alink="#FF9900"><!--mstheme--></font><h3 align="center"><!--mstheme--><font color="#3399FF"><font color="#000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;      <b><font size="6">第四章                    计算机算术——运算方法及运算器的设计</font></b></font><!--mstheme--></font></h3>                   <p align="left"><b><font color="#000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;            &nbsp;&nbsp;&nbsp;</font></b></p>               <!--msthemeseparator--><p align="center"><img src="arcsepd.gif"></p><p align="center"><b><font color="#000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></b></p><p align="left"><font color="#000000"><map name="FPMap0"><area href="4-1.htm" shape="rect" coords="363, 6, 585, 28"><area href="4-2.htm" shape="rect" coords="326, 31, 620, 53"><area href="4-3.htm" shape="rect" coords="261, 59, 699, 81"><area href="4-4.htm" shape="rect" coords="329, 91, 623, 113"><area href="4-5.htm" shape="rect" coords="215, 128, 725, 150"><area href="4-6.htm" shape="rect" coords="374, 158, 596, 180"><area href="4-7.htm" shape="rect" coords="380, 191, 602, 213"><area href="4-8.htm" shape="rect" coords="379, 226, 601, 248"></map><span style="position: absolute; left: 27; top: 179"><!--webbotbot="ImageMap" startspantext=" (379,226) (601, 248) { 浮点运算} {宋体} 12 B #ffffff CT 0  4-8.htm"text=" (380,191) (602, 213) { 除法运算} {宋体} 12 B #ffffff CT 0  4-7.htm"text=" (374,158) (596, 180) { 乘法运算} {宋体} 12 B #ffffff CT 0  4-6.htm"text=" (215,128) (725, 150) { 构造算术逻辑单元} {宋体} 12 B #ffffff CT 0  4-5.htm"text=" (329,91) (623, 113) { 逻辑操作} {宋体} 12 B #ffffff CT 0  4-4.htm"text=" (261,59) (699, 81) {加减运算（二进制）} {宋体} 12 B #ffffff CT 0  4-3.htm"text=" (326,31) (620, 53) {负数的表示} {宋体} 12 B #ffffff CT 0  4-2.htm"text=" (363,6) (585, 28) {概述} {宋体} 12 B #ffffff CT 0  4-1.htm"border="0" src="images/D7.gif" u-originalsrc="images/D7.gif"u-overlaysrc="_overlay/chapter4.htm_txt_D7.gif" width="941" height="267" --><img border="0" src="_overlay/chapter4.htm_txt_D7_cmp.gif" width="941" height="267" usemap="#FPMap0"><!--webbotbot="ImageMap" I-CheckSum="65436" endspan --></span></font></p><p align="left"><font color="#000000">　</font></p><p align="left">　</p><p align="left">　</p><p align="left">　</p><p align="left">　</p><p align="left">　</p><p align="center">　</p><p align="center">　    </p>        <p align="center"><b><font color="#000000"><a href="../index.htm"><img border="0" src="images/UP.GIF" align="right" width="53" height="35"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;     <a href="../chapter3/index.htm"><img border="0" src="images/Prev.gif" width="60" height="45"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;     <a href="../chapter5/index.htm"><img border="0" src="images/Forw.gif" width="60" height="45"></a></font></b>        </p>                <p align="center">　    </p>        <!--mstheme--></font>        </body>        </html>
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