分数计算器/title> <meta name="description" content="带分数和步长的分数计算器"> <style> .calc tr td { padding:0px; margin:0px; width:2em; } #td12, #td13 { width:2em !important; padding-bottom:0px; } #td21, #td22 { width:2em !important; border-top:#000 2px solid; padding-top:1px; } #td11 input[type=number], #td14 input[type=number] { width:1.5em; text-align:center; font-size:250%; } .calc ul { list-style-type:none; margin:0 0 20px 0; padding:0; overflow:hidden; font:bold 1.2em; } .calc li { float:left; margin:0; padding:0; border:1px #ddd solid; background:#fff; } .calc li a { display:block; text-decoration:none; padding:8px; } .calc li a:hover { background:#fff; } .calc input[type=text],.calc input[type=number] { width:2em; text-align:center; font-size:x-large; padding:4px; } .calc button { margin:10px auto; padding:7px; } .calc select { margin:auto 10px; font:bold xx-large "Times New Roman"; } .calc table input[type=number]:focus, .calc select:focus { background:#fff; -webkit-box-shadow:#68b4df 0 0 3px 2px; -moz-box-shadow:#68b4df 0 0 3px 2px; box-shadow:#68b4df 0 0 3px 2px; } .calc tr:nth-child(7) td { padding:5px; border:1px #c0c0c0 solid; } .active { background:#eee; color:#000 !important; } #out { width:100%; text-align:left; margin-bottom:5px; } #frac { height:42px; } #area { width:100%; font-size:x-large; } input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; } input[type=number] { -moz-appearance:textfield; } @media all and (max-width: 576px) { .calc { padding:10px 15px; width:100%; } #wrapper td { padding-right:0px; padding-left:0px; } } @media all and (max-width: 320px) { .calc { padding:10px 5px; } .calc select { margin:auto 0; } } @media all and (min-width: 577px) { .calc { padding:20px; width:380px; } }</style>  <link rel="canonical" href="https://www.titaotie.com/calc/math/fractions-calculator.html" /> <script async src="../../assets/js/coun-w3.js" ></script>  <script async src="https://www.googletagmanager.com/gtag/js?id=G-3LS30VWYXF"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-3LS30VWYXF'); </script> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-1832854270693044" crossorigin="anonymous"></script> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?ac0ee223cbf63018bf5c2c97c286c454"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> <meta name="dateModified" content="2026-05-15"> </head> <body> <div id="header"> <div> <div id="logo" class="box"> <p> <a href="../../index.htm">无涯在线工具箱</a> </p> </div> </div> </div> <div id="wrapper"> <div id="nav">  <a href="../../index.htm">首页</a>/<a href="../index.html">计算器</a>/<a href="index.html">数学计算器</a>/分数计算器!-- #EndEditable --> </div> <div id="top-ad"> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-1832854270693044" data-ad-slot="2671835991" data-ad-format="auto" data-full-width-responsive="true"></ins> </div> <div id="lcol"> <div id="doc">  <p class="doc-update">最后修改时间：2026年5月15日</p> <h1>分数计算器</h1>  <p>输入分数，选择运算，然后按计算按钮。</p> <form action="https://www.titaotie.com/calc/math/fractions-calculator.html" name="calcform" autocomplete="off"> <table class="calc"> <tr> <td> <ul> <li><a href="javascript:void(0)" id="sf">简单分数</a></li> <li><a href="javascript:void(0)" id="mf">混合分数</a></li> </ul> </td> </tr> <tr> <td> <table> <tr> <td id="td11" rowspan="2"><input type="number" step="1" id="x1" tabindex="1"></td> <td id="td12"><input type="number" step="1" id="n1" tabindex="2" autofocus></td> <td id="td13" rowspan="2"> <select id="op" tabindex="4"> <option selected> + </option> <option> -- </option> <option> × </option> <option> ÷ </option> </select> </td> <td id="td14" rowspan="2"><input type="number" step="1" id="x2" tabindex="5"></td> <td id="td15"><input type="number" step="1" id="n2" tabindex="6"></td> </tr> <tr> <td id="td21"><input type="number" step="1" id="d1" tabindex="3"></td> <td id="td22"><input type="number" step="1" id="d2" tabindex="7"></td> </tr> </table> </td> </tr> <tr> <td> <button type="button" title="计算" class="btn" onclick="fcalc()" tabindex="5"><img src="../../assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings_018_cog.png" tppabs="https://www.titaotie.com/assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings-018-cog.png" alt=""> 计算</button> <button type="reset" title="重置" class="btn" onclick="freset()" tabindex="6"><img src="../../assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings_013_remove.png" tppabs="https://www.titaotie.com/assets/lib/icons/glyphicons_all/glyphicons_halflings/glyphicons_halflings-013-remove.png" alt=""> 重置</button> </td> </tr> <tr> <td>结果：</td> </tr> <tr> <td><input type="text" id="out" tabindex="7" class="outtext" readonly></td> </tr> <tr> <td>视图）</td> </tr> <tr> <td><canvas id="frac"></canvas></td> </tr> <tr> <td>计算方式）</td> </tr> <tr> <td><textarea rows="7" id="area" tabindex="8" class="outtext" readonly></textarea></td> </tr> </table> </form> <p><a href="simplifying-fractions-calculator.html">简化分数计算器</a></p> <h4>添加分数示例</h4> <p class="math">1/2 + 1/3 =×3 + 1×2×3 5/6</p> <h4>减分数示例</h4> <p class="math">1/2-1/3 =×3-1-2×3 1/6</p> <h4>乘法分数示例</h4> <p class="math">1/2×1/3 =×1×3 1/6</p> <h4>除数示例</h4> <p class="math">1/2÷1/3 = 1/2×3/1 =×3×1 3/2 = 1 1/2</p> <p> </p> <div id="bottom-ad_2"> </div><hr> <h2>另请参阅</h2> <ul class="seealso"> <li><a href="simplifying-fractions-calculator.html">简化分数计算器</a></li> <li><a href="../../convert/number/fraction-to-decimal.html">分数到十进制转换</a></li> <li><a href="../../convert/number/fraction-to-percent.html">分数转换百分</a></li> <li><a href="adding-fractions-calculator.html">加分数计算器</a></li> <li><a href="subtracting-fractions-calculator.html">减分数计算器</a></li> <li><a href="multiplying-fractions-calculator.html">乘法分数计算器</a></li> <li><a href="dividing-fractions-calculator.html">除数计算器</a></li> <li><a href="../../convert/number/decimal-to-fraction.html">小数到分数转换</a></li> <li><a href="../../convert/number/percent-to-fraction.html">百分比转换为分数</a></li> <li><a href="gcf-calculator.html">GCF计算器</a></li> <li><a href="lcm-calculator.html">LCM计算器</a></li> <li><a href="percentage-calculator.html">百分比计算器</a></li> </ul> <script src="../../assets/calc/calc2.js" defer></script> <script src="../../assets/convert/number.js" defer></script> <script src="../../assets/lib/utils/mathview.js" ></script> <script src="../../assets/ajax/libs/jquery/1.10.2/jquery.min.js" ></script> <script> $( document ).ready(function() { $('#td11').hide(); $('#td14').hide(); $('#mf').toggleClass("active"); $('#sf').click(function() { if( $(this).hasClass("active") ) { $(this).toggleClass("active"); $('#mf').toggleClass("active"); $('#td11').hide(); $('#td14').hide(); $('#x1').val(''); $('#x2').val(''); $('#n1').focus(); } }); $('#mf').click(function() { if( $(this).hasClass("active") ) { $(this).toggleClass("active"); $('#sf').toggleClass("active"); $('#td11').show(); $('#td14').show(); $('#x1').focus(); } }); }); function freset() { var obj = document.getElementById("frac"); ClearView(obj); } function fcalc() { var out1 = out2 = ''; var s1=s2=s3=1; var w1 = $('#x1').val(); var n1 = $('#n1').val(); var d1 = $('#d1').val(); var w2 = $('#x2').val(); var n2 = $('#n2').val(); var d2 = $('#d2').val(); var op = $('#op').prop('selectedIndex'); if( n1=='' || d1=='' || n2=='' || d2=='' ) { alert("Please enter 2 fractions"); return; } if( w1=='-' ) { s1=-1; w1='0'; } if( w2=='-' ) { s2=-1; w2='0'; } if( w1=='' ) w1='0'; if( w2=='' ) w2='0'; w1 = parseInt(w1); n1 = parseInt(n1); d1 = parseInt(d1); w2 = parseInt(w2); n2 = parseInt(n2); d2 = parseInt(d2); op = parseInt(op); if( w1==0 && (n1/d1)<0 ) s1=-1; if( w2==0 && (n2/d2)<0 ) s2=-1; n1 = Math.abs(n1); d1 = Math.abs(d1); n2 = Math.abs(n2); d2 = Math.abs(d2); if( w1!=0 || w2!=0 ) { $('#n1').val(n1); $('#d1').val(d1); $('#n2').val(n2); $('#d2').val(d2); } if( w1<0 ) { s1=-1; w1=-w1; } if( w2<0 ) { s2=-1; w2=-w2; } _n1 = s1*(n1+w1*d1); _n2 = s2*(n2+w2*d2); if( op==0 ) // + { n3 = _n1*d2+_n2*d1; d3 = d1*d2; } else if( op==1 ) // - { n3 = _n1*d2-_n2*d1; d3 = d1*d2; } else if( op==2 ) // x { n3 = _n1*_n2; d3 = d1*d2; } else { n3 = _n1*d2; d3 = d1*_n2; } if( (n3/d3)<0 ) s3=-1; n3 = Math.abs(n3); d3 = Math.abs(d3); g = gcd(n3,d3); n3/=g; d3/=g; sn3 = s3*n3; sd3 = d3; out1 = sn3+'/'+sd3; if( n3>d3 ) { i = Math.floor(n3/d3); j = n3-i*d3; if( j>0 ) { sign=''; if( s3==-1 ) sign = '-'; out2 = sign+i+' '+j+'/'+d3; } } out3 = roundresult(s3*n3/d3); if( out1!='' ) out1+=' = '; if( out2!='' ) out2+=' = '; out = out1+out2+out3; $('#out').val(out); ops = [' + ',' - ',' \u00D7 ',' / '][op]; out = ''; if( w1!='' ) out+=w1+' '; out += (s1*n1)+'/'+d1; out += ops; if( w2!='' ) out+=w2+' '; out += (s2*n2)+'/'+d2; if( w1!=0 || w2!=0 ) { out += '\n= '; out += (n1+d1*w1)+'/'+d1; out += ops; out += (n2+d2*w2)+'/'+d2; } d4 = d1*d2/gcd(d1,d2); out += '\n= '; if( op==0 || op==1 ) { out += (_n1*d4/d1)+'/'+d4+ops+(_n2*d4/d2)+'/'+d4; if( op==0 ) { a = (_n1*d4/d1+_n2*d4/d2); b = d4; } else { a = (_n1*d4/d1-_n2*d4/d2); b = d4; } } else if( op==2 ) { out += '('+_n1+'\u00D7'+_n2+') / ('+d1+'\u00D7'+d2+')'; a = (_n1*_n2); b = (d1*d2); } else { out += '('+_n1+'\u00D7'+d2+') / ('+d1+'\u00D7'+_n2+')'; a = (_n1*d2); b = (d1*_n2); } out += '\n= '; out += a+'/'+b; g = gcd(a,b); if( g>1 ) { a/=g; b/=g; out += '\n= '; out += a+'/'+b; } out += '\n= '; out += roundresult(a/b); $('#area').val(out); var w3=0; if( n3>d3 ) { w3 = Math.floor(n3/d3); n3 -= w3*d3; } var obj = document.getElementById("frac"); CircNumber(obj,{ n: w3, num: n3, den: d3, radius: 20, fillColor: "rgb(80,192,0)", lineWidth: 1 }); 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