{"id":2301,"date":"2020-10-03T02:10:02","date_gmt":"2020-10-02T18:10:02","guid":{"rendered":"https:\/\/www.study-together.com\/edu\/?page_id=2301"},"modified":"2020-11-02T22:27:08","modified_gmt":"2020-11-02T14:27:08","slug":"estimation-method","status":"publish","type":"page","link":"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/estimation-method\/","title":{"rendered":"9. \u4f30\u7b97 > \u4f30\u7b97\u7684\u65b9\u6cd5"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2301\" class=\"elementor elementor-2301\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-19e63d3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"19e63d3\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-d45f7b0\" data-id=\"d45f7b0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6665f18 elementor-widget elementor-widget-text-editor\" data-id=\"6665f18\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>9.1 \u4f30\u7b97\u7684\u65b9\u6cd5 (Methods of Estimation)<\/h2><h3>9.1.1. \u6700\u5de6\u6578\u5b57\u6cd5 (Front-end Method)<\/h3><p>\u4fc2\u201c\u6700\u5de6\u6578\u5b57\u6cd5\u201d\u5165\u9762\uff0c\u6211\u54cb\u53ea\u651e\u6700\u982d\u55f0\u500b\u6578\u5b57\u3002<\/p><p>\u4f8b1\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p><ul><li>\\(44.5 \\approx 40\\)<\/li><li>\\(185 \\approx 100\\)<\/li><li>\\(1.24 \\approx 1\\)<\/li><li>\\(0.89 \\approx 0\\)<\/li><\/ul><p>\u4f9d\u500b\u65b9\u6cd5\u96d6\u7136\u5feb\uff0c\u4e0d\u904e\u8aa4\u5dee\u53ef\u80fd\u6703\u597d\u5927\u3002<\/p><p>\u00a0<\/p><h3>9.1.2. \u56db\u62fe\u4e94\u5165\u6cd5 (Rounding Off)<\/h3><p>\u201c\u56db\u62fe\u4e94\u5165\u6cd5\u201d\u61c9\u8a72\u4fc2\u5927\u5bb6\u6700\u719f\u5605\u4e00\u500b\u4f30\u7b97\u65b9\u6cd5\u3002<\/p><p>\u4f8b2\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p><ul><li>\\(674 \\approx 670 (\u6e96\u78ba\u81f3\u5341\u4f4d) \\)<\/li><li>\\(473 \\approx 500 (\u6e96\u78ba\u81f3\u767e\u4f4d) \\)\\<\/li><\/ul><p>\u00a0<\/p><h3>9.1.3.\u00a0 \u4e0a\u6368\u5165\u6cd5 \/ \u4e0b\u6368\u5165\u6cd5 (Rounding Up \/ Rounding Down)<\/h3><p>\u5728\u4f30\u7b97\u6642\uff0c\u6211\u54cb\u53ef\u4ee5\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u7684\u9700\u8981\u800c\u53d6\u8f03\u5927\u6216\u8f03\u5c0f\u7684\u4f30\u7b97\u503c\u3002<\/p><ul><li><strong>\u4e0a\u6368\u5165\u6cd5<\/strong>\uff1a\u7576\u9700\u8981\u4e00\u500b\u8f03\u5927\u7684\u4f30\u8a08\u503c\u6642\u4f7f\u7528\uff08\u5373\u4fc2<strong>\u4f30\u503c\u4e00\u5b9a\u6bd4\u771f\u5be6\u503c\u5927<\/strong>\uff09\u3002<\/li><li><strong>\u4e0b\u6368\u5165\u6cd5<\/strong>\uff1a\u7576\u9700\u8981\u4e00\u500b\u8f03\u5c0f\u7684\u4f30\u8a08\u503c\u6642\u4f7f\u7528\uff08\u5373\u4fc2<strong>\u4f30\u503c\u4e00\u5b9a\u6bd4\u771f\u5be6\u503c\u5c0f<\/strong>\uff09\u3002<\/li><\/ul><p>\u4f8b3\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u9673\u5148\u751f\u60f3\u8cfc\u8cb7\u4e00\u90e84500\u5143\u7684\u76f8\u6a5f\u3002\u82e5\u4ed6\u5728\u4e09\u6708\u4efd\u6bcf\u5929\u5132\u84c4153\u5143\uff0c\u4ed6\u80fd\u5426\u8cb7\u4e0b\u76f8\u6a5f\uff1f<br \/>\u89e3\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5728\u9019\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u5fc5\u9808\u4f7f\u7528\u4e0b\u62fe\u5165\u6cd5\u569f\u9032\u884c\u4f30\u503c\u3002\u5426\u5247\uff0c\u5c31\u7b97\u4f30\u76f4\u5927\u65bc4500\u5143\uff0c\u6211\u5011\u4e5f\u4e0d\u80fd\u78ba\u4fdd\u9673\u5148\u751f\u7684\u5132\u84c4\u8db3\u5920\u8cfc\u8cb7\u76f8\u6a5f\u3002<\/p><p style=\"padding-left: 40px;\">\\(\\begin{align}<br \/>\u4e09\u6708\u4efd\u7684\u5132\u84c4 &amp; = 153 x 31 \\\\<br \/>&amp; \\approx 150 x 30 \\\\<br \/>&amp; = 4500\u5143<br \/>\\end{align}\\)<\/p><p style=\"padding-left: 40px;\">\u7531\u65bc\u4e0b\u62fe\u5165\u5f8c\u7684\u5132\u84c4\u76f8\u7b49\u65bc\u76f8\u6a5f\u7684\u50f9\u503c\uff0c\u9673\u5148\u751f\u4e09\u6708\u4efd\u7684\u5132\u84c4\u8db3\u5920\u8cb7\u8a72\u90e8\u76f8\u6a5f\u3002<\/p><p>\u00a0<\/p><h3>9.1.4. \u76f8\u5bb9\u6578\u5b57\u6cd5 (Compatible Numbers)<\/h3><p>\u6240\u8b02\u201c\u76f8\u5bb9\u6578\u5b57\u201d\u5176\u5be6\u4fc2\u65b9\u4fbf\u6211\u54cb\u8a08\u7b97\u5605\u6578\u5b57\u3002<\/p><p>\u4f8b4\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u4f30\u8a08 963 \u00f7 2.89 + 7<br \/>\u89e3\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u53d62.89\u7684\u8fd1\u4f3c\u503c\u70ba 3\uff0c\u5247 963 \u53ca 3 \u70ba\u4e00\u7d44\u76f8\u5bb9\u6578\u5b57\uff08\u56e0\u70ba\u6211\u54cb\u53ef\u4ee5\u6bd4\u8f03\u5bb9\u6613\u5481\u8a08\u5230963\u96643\u5605\u7d50\u679c\uff09\u3002<\/p><p style=\"padding-left: 40px;\">\\(\\begin{align}<br \/>963 \u00f7 2.89 + 7 &amp; \\approx 963 \u00f7 3 + 7 \\\\<br \/>&amp; = 321 + 7 \\\\<br \/>&amp; = 328<br \/>\\end{align}\\)<\/p><p>\u00a0<\/p><h3>9.1.5. \u96c6\u4e2d\u6578\u5b57\u6cd5 (Clustering)<\/h3><p>\u4f8b5\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0 \u4f30\u8a08 11.2 \u2013 2.3 \u2013 2.1 \u2013 2.05 \u2013 1.91 \u2013 2.51<br \/>\u89e3\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u53d6 2 \u70ba\u96c6\u4e2d\u6578\u5b57<\/p><p style=\"padding-left: 40px;\">\\(\\begin{align}<br \/>&amp; 11.2 \u2013 2.3 \u2013 2.1 \u2013 2.05 \u2013 1.91 \u2013 2.51 \\\\<br \/>&amp; \\approx 11.2 \u2013 2 \u2013 2 \u2013 2 \u2013 2 \u2013 2 \\\\<br \/>&amp; = 11.2 &#8211; 10 \\\\<br \/>&amp; = 1.2<br \/>\\end{align}\\)<\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-cf1449a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cf1449a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-2223ef2\" data-id=\"2223ef2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-68e61bd elementor-widget elementor-widget-text-editor\" data-id=\"68e61bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/functions-skills\/\">\n<i class=\"far fa-arrow-alt-circle-left\" aria-hidden=\"true\"><\/i> \u51fd\u6578 &#8211; \u8981\u8b58\u7684\u6280\u5de7<\/a>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-d91ac2c\" data-id=\"d91ac2c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-83ed65b\" data-id=\"83ed65b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1d42b96 elementor-widget elementor-widget-text-editor\" data-id=\"1d42b96\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: right;\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/estimation-errors\/\">\u4f30\u7b97 &#8211; \u91cf\u5ea6\u7684\u8aa4\u5dee <i class=\"far fa-arrow-alt-circle-right\" aria-hidden=\"true\"><\/i><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-14f8a03\" data-id=\"14f8a03\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-224fc8a elementor-widget elementor-widget-sidebar\" data-id=\"224fc8a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"sidebar.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"sidebar-box widget-oceanwp-custom-menu custom-menu-widget clr\"><style type=\"text\/css\">.ocean_custom_menu-5 > ul > li > a, .custom-menu-widget .ocean_custom_menu-5 .dropdown-menu .sub-menu li a.menu-link{font-size:16px;line-height:17px;}.custom-menu-widget .ocean_custom_menu-5.oceanwp-custom-menu > ul.click-menu .open-this{font-size:16px;}<\/style><h4 class=\"widget-title\">DSE\u6578\u5b78 &#8211; \u5fc5\u4fee\u90e8\u5206\u3010\u76ee\u9304\u3011<\/h4><div class=\"oceanwp-custom-menu clr ocean_custom_menu-5 left dropdown-hover\"><ul id=\"menu-dsemaths_core\" class=\"dropdown-menu sf-menu\"><li  id=\"menu-item-1744\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-1744\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/course-analysis\/\" class=\"menu-link\">\u8ab2\u7a0b\u5206\u6790 (Core)<\/a><\/li>\n<li  id=\"menu-item-1745\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children dropdown menu-item-1745\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/\" class=\"menu-link\">\u5514\u597d\u4ee5\u70ba\u5514\u99db\u8003 &#8211; \u76ee\u9304 <span class=\"nav-arrow fa fa-angle-down\"><\/span><\/a>\n<ul class=\"sub-menu\">\n\t<li  id=\"menu-item-4067\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4067\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/solving-equation\/\" class=\"menu-link\">1. \u89e3\u65b9\u7a0b<\/a><\/li>\n\t<li  id=\"menu-item-4068\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4068\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/polynomials\/\" class=\"menu-link\">2. \u591a\u9805\u5f0f<\/a><\/li>\n\t<li  id=\"menu-item-4069\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4069\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/laws-of-indices\/\" class=\"menu-link\">3. \u6307\u6578\u5b9a\u5f8b<\/a><\/li>\n\t<li  id=\"menu-item-4070\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4070\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/factorization\/\" class=\"menu-link\">4. \u56e0\u5f0f\u5206\u89e3<\/a><\/li>\n\t<li  id=\"menu-item-4071\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4071\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/formulae\/\" class=\"menu-link\">5. \u516c\u5f0f<\/a><\/li>\n\t<li  id=\"menu-item-4072\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4072\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/percentage\/\" class=\"menu-link\">6. \u767e\u5206\u6cd5<\/a><\/li>\n\t<li  id=\"menu-item-4073\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4073\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/rate-and-ratio\/\" class=\"menu-link\">7. \u7387\u53ca\u6bd4<\/a><\/li>\n\t<li  id=\"menu-item-4074\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4074\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/functions\/\" class=\"menu-link\">8. \u51fd\u6578<\/a><\/li>\n\t<li  id=\"menu-item-4075\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4075\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/estimation\/\" class=\"menu-link\">9. \u4f30\u7b97<\/a><\/li>\n\t<li  id=\"menu-item-4076\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4076\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/inequalities\/\" class=\"menu-link\">10. \u4e0d\u7b49\u5f0f<\/a><\/li>\n\t<li  id=\"menu-item-4077\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4077\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/coordinates\/\" class=\"menu-link\">11. \u5750\u6a19<\/a><\/li>\n\t<li  id=\"menu-item-4079\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4079\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/geometry\/\" class=\"menu-link\">12. \u6f14\u7e79\u63a8\u7406\u5e7e\u4f55<\/a><\/li>\n\t<li  id=\"menu-item-4080\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4080\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/trigonometry\/\" class=\"menu-link\">13. \u4e09\u89d2\u6bd4<\/a><\/li>\n\t<li  id=\"menu-item-4081\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4081\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/shapes\/\" class=\"menu-link\">14. \u5e73\u9762\u53ca\u7acb\u9ad4\u5716\u5f62<\/a><\/li>\n\t<li  id=\"menu-item-4082\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4082\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/15-probability\/\" class=\"menu-link\">15. \u6982\u7387<\/a><\/li>\n\t<li  id=\"menu-item-4083\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4083\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/16-statistics\/\" class=\"menu-link\">16. \u7d71\u8a08<\/a><\/li>\n<\/ul>\n<\/li>\n<li  id=\"menu-item-3231\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3231\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/fundamental_algebra\/\" class=\"menu-link\">\u57fa\u790e &#8211; \u6578\u8207\u4ee3\u6578<\/a><\/li>\n<li  id=\"menu-item-3241\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3241\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/fundamental-shape_n_space\/\" class=\"menu-link\">\u57fa\u790e &#8211; \u5ea6\u91cf\u3001\u5716\u5f62\u8207\u7a7a\u9593<\/a><\/li>\n<li  id=\"menu-item-3246\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3246\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/fundamental_data_handling\/\" class=\"menu-link\">\u57fa\u790e &#8211; \u6578\u64da\u8655\u7406<\/a><\/li>\n<li  id=\"menu-item-3290\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3290\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/non_fundamental_algebra\/\" class=\"menu-link\">\u975e\u57fa\u790e &#8211; \u6578\u8207\u4ee3\u6578<\/a><\/li>\n<li  id=\"menu-item-3288\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3288\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/non_fundamental-shape_n_space\/\" class=\"menu-link\">\u975e\u57fa\u790e &#8211; \u5ea6\u91cf\u3001\u5716\u5f62\u8207\u7a7a\u9593<\/a><\/li>\n<li  id=\"menu-item-3289\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3289\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/non_fundamental_data_handling\/\" class=\"menu-link\">\u975e\u57fa\u790e &#8211; \u6578\u64da\u8655\u7406<\/a><\/li>\n<\/ul><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>9.1 \u4f30\u7b97\u7684\u65b9\u6cd5 (Methods of Estimation) 9.1.1. \u6700\u5de6\u6578\u5b57\u6cd5 (Front-e 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