{"id":3451,"date":"2025-12-24T17:21:22","date_gmt":"2025-12-24T08:21:22","guid":{"rendered":"https:\/\/math-travel.com\/?p=3451"},"modified":"2026-02-11T17:28:00","modified_gmt":"2026-02-11T08:28:00","slug":"real-number","status":"publish","type":"post","link":"https:\/\/math-travel.jp\/math-1\/real-number\/","title":{"rendered":"\u5b9f\u6570\u3068\u306f\uff1f\u6709\u7406\u6570\u30fb\u7121\u7406\u6570\u306e\u9055\u3044\u3068\u300c\u865a\u6570\u300d\u3068\u306e\u898b\u5206\u3051\u65b9\u3092\u5177\u4f53\u4f8b\u3067\u89e3\u8aac"},"content":{"rendered":"\n<p><span class=\"huto\">\u300c\u3069\u308c\u304c\u5b9f\u6570\u304b\u5206\u304b\u3089\u306a\u3044\u300d<\/span><br><span class=\"huto\">\u300c\u5b9f\u6570\u306e\u5177\u4f53\u4f8b\u3092\u6559\u3048\u3066\u6b32\u3057\u3044\u300d<\/span><\/p>\n\n\n\n<p>\u4eca\u56de\u306f\u5b9f\u6570\u306b\u95a2\u3059\u308b\u3053\u3093\u306a\u60a9\u307f\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi5-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u3069\u308c\u304c\u5b9f\u6570\u306a\u306e\u304b\u3088\u304f\u5206\u304b\u3063\u3066\u3044\u306a\u304f\u3066\u2026<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u6570\u5b66\u3067\u306f\u3001<span class=\"hutoaka\">&#8220;\u5b9f\u6570&#8221;<\/span>\u3068\u3044\u3046\u8a00\u8449\u304c\u3088\u304f\u51fa\u3066\u304d\u307e\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u300c\u306a\u306b\u304c\u5b9f\u6570\u306b\u542b\u307e\u308c\u308b\u3093\u3060\u3063\u3051&#8230;\u300d<\/p>\n\n\n\n<p>\u9ad8\u6821\u751f\u306e\u50d5\u3082\u3042\u307e\u308a\u5206\u304b\u3063\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u7d50\u8ad6\u304b\u3089\u8a00\u3046\u3068\u3001\u5b9f\u6570\u3068\u306f<span class=\"yellow-hoso\">\u300c\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u7dcf\u79f0\u300d<\/span>\u3067\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image wp-image-3453 size-full\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"528\" height=\"203\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570.jpg\" alt=\"\u5b9f\u6570\u3068\u306f\uff1f\" class=\"wp-image-3453\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570.jpg 528w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570-300x115.jpg 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><figcaption class=\"wp-element-caption\">\u5b9f\u6570\u306b\u542b\u307e\u308c\u308b\u3082\u306e<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u9ad8\u6821\u751f\u6570\u5b66\u306e\u7bc4\u56f2\u3067\u8a00\u3046\u3068\u3001<span class=\"huto\">\u865a\u6570\u4ee5\u5916\u306f\u3059\u3079\u3066\u5b9f\u6570<\/span>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3068\u3066\u3082\u7c21\u6f54\u306b\u7d50\u8ad6\u3060\u3051\u3092\u8ff0\u3079\u307e\u3057\u305f\u304c\u3001\u307e\u3060\u5b8c\u5168\u306a\u7406\u89e3\u306b\u306f\u81f3\u3063\u3066\u3044\u306a\u3044\u65b9\u3082\u591a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f<span class=\"hutoaka\">\u5b9f\u6570\u306e\u5b9a\u7fa9\u3084\u5177\u4f53\u4f8b\u306b\u3064\u3044\u3066\u89e3\u8aac<\/span>\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5b9f\u6570\u3067\u306a\u3044\u3082\u306e\u306e\u4f8b\u3082\u7d39\u4ecb\u3057\u3066\u3044\u308b\u306e\u3067\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toha\">\u5b9f\u6570\u3068\u306f&#8221;\u6709\u7406\u6570&#8221;\u3068&#8221;\u7121\u7406\u6570&#8221;\u306e\u7dcf\u79f0<\/h2>\n\n\n\n<p>\u307e\u305a\u3001\u5b9f\u6570\u3068\u306f<span class=\"yellow-hoso\">\u300c\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u7dcf\u79f0\u300d<\/span>\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u9ad8\u6821\u6570\u5b66\u3067\u7fd2\u3046\u7bc4\u56f2\u3067\u8a00\u3046\u3068\u3001\u865a\u6570\u4ee5\u5916\u306e\u6570\u306f\u3059\u3079\u3066\u5b9f\u6570\u306b\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"528\" height=\"203\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570.jpg\" alt=\"\u5b9f\u6570\u3068\u306f\uff1f\" class=\"wp-image-3453\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570.jpg 528w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570-300x115.jpg 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><\/figure>\n<\/div>\n\n\n<p>\u306a\u306e\u3067\u3001\u5206\u6570\u3084\u30eb\u30fc\u30c8\u3001\u03c0\u306a\u3069\u3082\u5b9f\u6570\u306b\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5b9f\u6570\u306e\u4f8b<\/span><\/div><div class=\"cap_box_content\">\n<p>\u30fb\u6574\u6570<br>\\[-3,-2,-1,0,1,2,3\\]<\/p>\n\n\n\n<p>\u30fb\u6709\u9650\u5c0f\u6570<br>\\begin{eqnarray}<br>\\displaystyle 0.125&amp;=&amp;\\frac{1}{8}\\\\<br>\\displaystyle 0.0001&amp;=&amp;\\frac{1}{10000}<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u30fb\u5faa\u74b0\u5c0f\u6570<br>\\begin{eqnarray}<br>\\displaystyle 0.3333&#8230;&amp;=&amp;\\frac{1}{3}\\\\<br>\\displaystyle 0.2525&#8230;&amp;=&amp;\\frac{25}{99}<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u30fb\u7121\u7406\u6570(\u5faa\u74b0\u3057\u306a\u3044\u5c0f\u6570)<br>\\begin{eqnarray}<br>\\sqrt{2}=1.41421356&#8230;\\\\<br>\\pi =3.14159265&#8230;<br>\\end{eqnarray}<\/p>\n<\/div><\/div>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi5-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u3063\u3066\u306a\u3093\u3067\u3057\u305f\u3063\u3051\uff1f<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi1-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30b7\u30fc\u30bf<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u3064\u304e\u306f\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u9055\u3044\u3092\u78ba\u8a8d\u3059\u308b\u3088\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u9055\u3044<\/h2>\n\n\n\n<p>\u5b9f\u6570\u306f\u300c<span class=\"huto\">\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u7dcf\u79f0<\/span>\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u3053\u3067\u3001\u300c\u305d\u3082\u305d\u3082&#8221;\u6709\u7406\u6570&#8221;\u3068&#8221;\u7121\u7406\u6570&#8221;\u3063\u3066\u4f55\uff1f\u300d\u3068\u3044\u3046\u65b9\u3082\u3044\u307e\u3059\u3088\u306d\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"475\" height=\"224\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u6709\u7406\u6570\u3068\u7121\u7406\u6570.png\" alt=\"\u6709\u7406\u6570\u3068\u7121\u7406\u6570\" class=\"wp-image-6820\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u6709\u7406\u6570\u3068\u7121\u7406\u6570.png 475w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u6709\u7406\u6570\u3068\u7121\u7406\u6570-300x141.png 300w\" sizes=\"(max-width: 475px) 100vw, 475px\" \/><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u6570\u3092\u30d0\u30c3\u30c1\u30ea\u3068\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306b\u3064\u3044\u3066\u3082\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6709\u7406\u6570\u3068\u306f\uff1f<\/h3>\n\n\n\n<p>\u6709\u7406\u6570\u3068\u306f<span class=\"red-hoso\">\u300c\u5206\u6570\u306e\u5f62\u3067\u8868\u305b\u308b\u6570\u300d<\/span>\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3068\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"801\" height=\"260\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u6709\u7406\u6570.jpg\" alt=\"\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u9055\u3044\" class=\"wp-image-3460\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u6709\u7406\u6570.jpg 801w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u6709\u7406\u6570-300x97.jpg 300w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u6709\u7406\u6570-768x249.jpg 768w\" sizes=\"(max-width: 801px) 100vw, 801px\" \/><\/figure>\n<\/div>\n\n\n<p>\u6574\u6570\u306a\u3089\u3070\u3069\u3093\u306a\u6570\u3067\u3082\u5206\u6570\u306b\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\[\\displaystyle 3=\\frac{3}{1},-2=-\\frac{2}{1}\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u6b21\u306b\u30010,5\u30840,125\u306e\u3088\u3046\u306a\u6709\u9650\u306a\u5c0f\u6570\u3092\u6709\u9650\u5c0f\u6570\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6709\u9650\u5c0f\u6570\u306f\\(10^{n}\\)\u3092\u5206\u6bcd\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u5206\u6570\u3067\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\[\u6709\u9650\u5c0f\u6570\\displaystyle =\\frac{\u6574\u6570}{10^{n}}\\]<br>\\[\\displaystyle 0.05=\\frac{5}{100}\\]<\/p>\n\n\n\n<p>\\[\\displaystyle 0.1234=\\frac{1234}{10000}\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u7121\u9650\u5c0f\u6570\u306e\u306a\u304b\u3067\u3082\u3001\u540c\u3058\u6570\u5b57\u3092\u7e70\u308a\u8fd4\u3059\u3082\u306e\u3092\u5faa\u74b0\u5c0f\u6570\u3068\u3044\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u5faa\u74b0\u5c0f\u6570\u3092\u5206\u6570\u306b\u76f4\u3059\u306b\u306f\u3001\u3072\u3068\u624b\u9593\u52a0\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5faa\u74b0\u5c0f\u6570\\(0.3333\\cdots\\)\u3092\u4f8b\u306b\u3059\u308b\u3068\u3001<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"668\" height=\"210\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/04\/8-5.jpg\" alt=\"\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u9055\u3044\" class=\"wp-image-1867\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/04\/8-5.jpg 668w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/04\/8-5-300x94.jpg 300w\" sizes=\"(max-width: 668px) 100vw, 668px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"590\" height=\"209\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/04\/9-5.jpg\" alt=\"\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u9055\u3044\" class=\"wp-image-1868\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/04\/9-5.jpg 590w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/04\/9-5-300x106.jpg 300w\" sizes=\"(max-width: 590px) 100vw, 590px\" \/><\/figure>\n<\/div>\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001<\/p>\n\n\n\n<p>\\begin{eqnarray}<br>9x=3\\\\<br>\\displaystyle x=\\frac{1}{3}<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u5faa\u74b0\u5c0f\u6570\u3092\u5206\u6570\u306b\u76f4\u3059\u65b9\u6cd5\u306f\u300c\u5faa\u74b0\u5c0f\u6570\u306e\u4f8b\u3068\u5206\u6570\u306b\u76f4\u3059\u65b9\u6cd5\u300d\u306b\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7121\u7406\u6570\u3068\u306f\uff1f<\/h3>\n\n\n\n<p>\u4e00\u65b9\u3067\u3001<span class=\"red-hoso\">\u300c\u5206\u6570\u3067\u8868\u305b\u306a\u3044\u6570\u300d<\/span>\u3092\u7121\u7406\u6570\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7121\u7406\u6570\u3060\u3068\u5224\u65ad\u3059\u308b\u306e\u306f\u7c21\u5358\u3067\u3001\u30eb\u30fc\u30c8\u3084\\(\\pi\\)\u306a\u3069\u306e\u5faa\u74b0\u3057\u306a\u3044\u5c0f\u6570\u304c\u7121\u7406\u6570\u3067\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"468\" height=\"192\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u7121\u7406\u6570-e1625727221174.jpg\" alt=\"\u6709\u7406\u6570\u3068\u7121\u7406\u6570\" class=\"wp-image-3459\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u7121\u7406\u6570-e1625727221174.jpg 468w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u7121\u7406\u6570-e1625727221174-300x123.jpg 300w\" sizes=\"(max-width: 468px) 100vw, 468px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u7121\u7406\u6570\u3068\u306f\uff1f<\/span><\/div><div class=\"cap_box_content\">\n<p>\u7121\u7406\u6570\u21d2\u5faa\u74b0\u3057\u306a\u3044\u5c0f\u6570<br>\\(\\sqrt{2},-\\sqrt{5},\\pi\\)\u306a\u3069<\/p>\n<\/div><\/div>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi7-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u3092\u5408\u308f\u305b\u3066\u5b9f\u6570\u3068\u3044\u3046\u3093\u3060\u306d\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi1-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30b7\u30fc\u30bf<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u305d\u3046\u3044\u3046\u3053\u3068\uff01\u305d\u308c\u305e\u308c\u306e\u8a00\u8449\u306e\u5b9a\u7fa9\u306f\u899a\u3048\u3066\u304a\u3053\u3046\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"rei\">\u5b9f\u6570\u306e\u4f8b<\/h2>\n\n\n\n<p>\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u304c\u3001\u6539\u3081\u3066\u5b9f\u6570\u306e\u5177\u4f53\u4f8b\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\u30fb\u6574\u6570<br>\\[-3,-2,-1,0,1,2,3\\]<\/p>\n\n\n\n<p>\u30fb\u6709\u9650\u5c0f\u6570<br>\\begin{eqnarray}<br>\\displaystyle 0.125&amp;=&amp;\\frac{1}{8}\\\\<br>\\displaystyle 0.0001&amp;=&amp;\\frac{1}{10000}<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u30fb\u5faa\u74b0\u5c0f\u6570<br>\\begin{eqnarray}<br>\\displaystyle 0.3333&#8230;&amp;=&amp;\\frac{1}{3}\\\\<br>\\displaystyle 0.2525&#8230;&amp;=&amp;\\frac{25}{99}<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u30fb\u7121\u7406\u6570(\u5faa\u74b0\u3057\u306a\u3044\u5c0f\u6570)<br>\\begin{eqnarray}<br>\\sqrt{2}=1.41421356&#8230;\\\\<br>\\pi =3.14159265&#8230;<br>\\end{eqnarray}<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"not\">\u5b9f\u6570\u3067\u306a\u3044\u3082\u306e\u306e\u4f8b<\/h2>\n\n\n\n<p>\u5b9f\u6570\u306e\u5177\u4f53\u4f8b\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u304c\u3001\u9006\u306b\u5b9f\u6570\u3067\u306a\u3044\u3082\u306e\u306e\u4f8b\u3082\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u5b9f\u6570\u3067\u306a\u3044\u6570\u306b\u306f\u3001<span class=\"huto\">\u865a\u6570<\/span>\u3084<span class=\"huto\">\u56db\u6b21\u5143\u6570<\/span>\u306a\u3069\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\u30fb\u865a\u6570<br>\\[2\u22125i,5+7i\\]<\/p>\n\n\n\n<p>\u30fb\u56db\u6b21\u5143\u6570<br>\\[a+bi+cj+dk\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u865a\u6570\u3068\u306f\u8907\u7d20\u6570\u3092\u8868\u3059\u6570\u3067\u3001\\(i^{2}=\u22121\\)\u3092\u6e80\u305f\u3059\\(i\\)\u3092\u6301\u3064\u6570\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\u8907\u7d20\u6570\u306e\u4f8b\uff1a\\(2\u22125i,5+7i\\)<\/p>\n<\/div><\/div>\n\n\n\n<p>\u56db\u6b21\u5143\u6570\u3068\u306f\u8907\u7d20\u6570\u3092\u3055\u3089\u306b\u62e1\u5f35\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-bg_stripe\">\u56db\u6b21\u5143\u6570\u306e\u4e00\u822c\u9805\uff1a\\(a+bi+cj+dk\\)\uff08\\(a,b,c,d\\)\u306f\u5b9f\u6570\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"matome\">\u5b9f\u6570\u3000\u307e\u3068\u3081<\/h2>\n\n\n\n<p><span class=\"huto\">\u4eca\u56de\u306f\u5b9f\u6570\u306e\u5b9a\u7fa9\u3068\u5177\u4f53\u4f8b\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/span><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"528\" height=\"203\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570.jpg\" alt=\"\u5b9f\u6570\u3068\u306f\uff1f\" class=\"wp-image-3453\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570.jpg 528w, https:\/\/math-travel.jp\/wp-content\/uploads\/2020\/12\/\u5b9f\u6570-300x115.jpg 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u6570\uff1a<span class=\"hutoaka\">\u6709\u7406\u6570\u3068\u7121\u7406\u6570\u306e\u7dcf\u79f0<\/span><\/p>\n\n\n\n<p><span class=\"huto\">\u6709\u7406\u6570<\/span>\uff1a\u5206\u6570\u3067\u8868\u305b\u308b\u6570<br><span class=\"huto\">\u7121\u7406\u6570<\/span>\uff1a\u5206\u6570\u3067\u8868\u305b\u306a\u3044\u6570<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5b9f\u6570\u306e\u4f8b<\/span><\/div><div class=\"cap_box_content\">\n<p>\u30fb\u6574\u6570<br>\\[-3,-2,-1,0,1,2,3\\]<\/p>\n\n\n\n<p>\u30fb\u6709\u9650\u5c0f\u6570<br>\\begin{eqnarray}<br>\\displaystyle 0.125&amp;=&amp;\\frac{1}{8}\\\\<br>\\displaystyle 0.0001&amp;=&amp;\\frac{1}{10000}<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u30fb\u5faa\u74b0\u5c0f\u6570<br>\\begin{eqnarray}<br>\\displaystyle 0.3333&#8230;&amp;=&amp;\\frac{1}{3}\\\\<br>\\displaystyle 0.2525&#8230;&amp;=&amp;\\frac{25}{99}<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u30fb\u7121\u7406\u6570(\u5faa\u74b0\u3057\u306a\u3044\u5c0f\u6570)<br>\\begin{eqnarray}<br>\\sqrt{2}=1.41421356&#8230;\\\\<br>\\pi =3.14159265&#8230;<br>\\end{eqnarray}<\/p>\n<\/div><\/div>\n\n\n\n<p>\u5b9f\u6570\u306f\u3053\u308c\u304b\u3089\u3082\u305a\u3063\u3068\u4f7f\u3046\u8a00\u8449\u306a\u306e\u3067\u3001\u5fc5\u305a\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u305d\u308c\u3067\u306f\u6700\u5f8c\u307e\u3067\u8aad\u3093\u3067\u304f\u3060\u3055\u308a\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3042\u306a\u305f\u306e\u52aa\u529b\u304c\u5831\u308f\u308c\u307e\u3059\u3088\u3046\u306b\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u300c\u3069\u308c\u304c\u5b9f\u6570\u304b\u5206\u304b\u3089\u306a\u3044\u300d\u300c\u5b9f\u6570\u306e\u5177\u4f53\u4f8b\u3092\u6559\u3048\u3066\u6b32\u3057\u3044\u300d \u4eca\u56de\u306f\u5b9f\u6570\u306b\u95a2\u3059\u308b\u3053\u3093\u306a\u60a9\u307f\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002 \u6570\u5b66\u3067\u306f\u3001&#8220;\u5b9f\u6570&#8221;\u3068\u3044\u3046\u8a00\u8449\u304c\u3088\u304f\u51fa\u3066\u304d\u307e\u3059\u306d\u3002 \u300c\u306a\u306b\u304c\u5b9f\u6570\u306b\u542b\u307e\u308c\u308b\u3093\u3060\u3063\u3051&#8230; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4733,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[8,222],"tags":[9,10,11],"class_list":["post-3451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-suushiki","category-math-1","tag-9","tag-a","tag-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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