{"article_info":{"article_id":105419,"cat_id":807,"cat_title":"SGK Toán 7 - Kết nối tri thức","publish_time":1646279280,"cat_id2":807,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2022/0303/resize_8-3-0_9.jpg","title":"Giải bài 1.33 trang 24 SGK Toán 7 tập 1 - Kết nối tri thức","label":"Bài 1.33 trang 24","alias":"giai-bai-133-trang-24-sgk-toan-7-tap-1-ket-noi-tri-thuc","introtext":"Tính một cách hợp lí:","content":"<style>\r\n.method-close-icon{position: relative;float: right;top: 6px;transform: rotate(270deg);-ms-transform:rotate(270deg);-moz-transform:rotate(270deg);-webkit-transform:rotate(270deg);-o-transform:rotate(270deg);}\r\n.method-open-icon{position: relative;float: right;top: 6px;}\r\n</style>\r\n<p><strong style=\"font-size: 16px;\">Đề bài</strong></p><p>Tính một cách hợp lí:</p>\r\n<p>\\(\\begin{array}{l}a)A = 32,125 - (6,325 + 12,125) - (37 + 13,675)\\\\b)B = 4,75 + {\\left( {\\frac{{ - 1}}{2}} \\right)^3} + 0,{5^2} - 3.\\frac{{ - 3}}{8}\\\\c)C = 2021,2345.2020,1234 + 2021,2345.( - 2020,1234)\\end{array}\\)</p><div id=\"pos_end_question\"></div><div style=\"padding-top: 10px;padding-bottom: 2px;margin-bottom: 10px;\"><p class=\"show-detail-method\" style=\"background: #654bc2;text-align: center;border-radius:5px;padding: 10px;margin-bottom: 0px;\" onclick=\"showDetailMethod();\"><strong style=\"font-size: 16px;\">Phương pháp giải - Xem chi tiết</strong><img class=\"method-open-icon\" id=\"method_colapse_icon\" src=\"data:image/png;base64,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\"></p>  <div class=\"content_method_content\" style=\"padding: 10px 10px 5px 10px;border: dashed 1px #654bc2;border-top:none;\"><p>a) Phá ngoặc, nhóm các số hạng có tổng “đẹp”</p>\r\n<p>b) Nhóm các số hạng là phân số có cùng mẫu số</p>\r\n<p>c) Sử dụng tính phân phối của phép nhân đối với phép cộng: a.b + a.c = a.(b+c)</p>  </div>\r\n<script type=\"text/javascript\">\r\n    var is_open =true;\r\n    function showDetailMethod(){\r\n        if(is_open){\r\n            document.querySelector(\".content_method_content\").style.display='none';\r\n            document.getElementById(\"method_colapse_icon\").classList.remove(\"method-open-icon\");\r\n            document.getElementById(\"method_colapse_icon\").classList.add(\"method-close-icon\");\r\n        }else{\r\n            document.querySelector(\".content_method_content\").style.display='block';\r\n            document.getElementById(\"method_colapse_icon\").classList.remove(\"method-close-icon\");\r\n            document.getElementById(\"method_colapse_icon\").classList.add(\"method-open-icon\");\r\n        }\r\n        is_open = !is_open;\r\n    }\r\n</script>\r\n</div><p><strong style=\"font-size: 16px;\">Lời giải chi tiết</strong></p><p>\\(\\begin{array}{l}a)A = 32,125 - (6,325 + 12,125) - (37 + 13,675)\\\\ = 32,125 - 6,325 - 12,125 - 37 - 13,675\\\\ = (32,125 - 12,125) + ( - 6,325 - 13,675) - 37\\\\ = 20 + ( - 20) - 37\\\\ =  - 37\\\\b)B = 4,75 + {\\left( {\\frac{{ - 1}}{2}} \\right)^3} + 0,{5^2} - 3.\\frac{{ - 3}}{8}\\\\ = 4,75 + \\frac{{ - 1}}{8} + 0,25 + \\frac{9}{8}\\\\ = (4,75 + 0,25) + \\left( {\\frac{{ - 1}}{8} + \\frac{9}{8}} \\right)\\\\ = 5 + \\frac{8}{8}\\\\ = 5 + 1\\\\ = 6\\\\c)C = 2021,2345.2020,1234 + 2021,2345.( - 2020,1234)\\\\ = 2021,2345.[2020,1234 + ( - 2020,1234)]\\\\ = 2021,2345.0\\\\ = 0\\end{array}\\)</p>","common_article":"","display_type":1,"vungoi_exam_id":"","article_type":1,"cmt_count":21,"zip_status":1,"last_modified_time":1664419044,"last_zip_time":1664419044,"zip_link":"https://offline.loigiaihay.com/articles/807/105419/105419_1646279494.zip","picture":"https://img.loigiaihay.com/picture/article/2022/0303/8-3-0_9.jpg","youtube_id":"","video_start_time":"0","quizlet_id":"0","ref_article_id":0,"readmore_display_type":0,"wiki":0,"comment_url":"https://loigiaihay.com/comment/giai-bai-133-trang-24-sgk-toan-7-tap-1-ket-noi-tri-thuc-c807a105419.html","origin_url":"https://loigiaihay.com/giai-bai-133-trang-24-sgk-toan-7-tap-1-ket-noi-tri-thuc-c807a105419.html","relate_link":[]},"callouts":[],"relate_articles":[],"others_in_cat":[{"article_id":105421,"cat_id":807,"publish_time":1646279460,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2022/0303/resize_8-3-0_10.jpg","title":"Giải bài 1.34 trang 24 SGK Toán 7 tập 1 - Kết nối tri thức","alias":"giai-bai-134-trang-24-sgk-toan-7-tap-1-ket-noi-tri-thuc","introtext":"Đặt một cặp dấu ngoặc “( )” vào biểu thức sau để được kết quả bằng 0.\r\n2,2 – 3,3 + 4,4 – 5,5.\r\n","display_type":1,"article_type":1},{"article_id":105418,"cat_id":807,"publish_time":1646279100,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2022/0303/resize_8-3-0_8.jpg","title":"Giải bài 1.32 trang 24 SGK Toán 7 tập 1 - Kết nối tri thức","alias":"giai-bai-132-trang-24-sgk-toan-7-tap-1-ket-noi-tri-thuc","introtext":"Diện tích một số hồ nước ngọt lớn nhất trên thế giới được cho trong bảng sau. Em hãy sắp xếp chúng theo thứ tự diện tích từ nhỏ đến lớn.","display_type":1,"article_type":1},{"article_id":105414,"cat_id":807,"publish_time":1646278860,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2022/0303/resize_8-3-0_7.jpg","title":"Giải bài 1.31 trang 24 SGK Toán 7 tập 1 - Kết nối tri thức","alias":"giai-bai-131-trang-24-sgk-toan-7-tap-1-ket-noi-tri-thuc","introtext":"Tìm x, biết:","display_type":1,"article_type":1}],"event_info":{"title":"Luyện tập chung trang 23 Toán 7 kết nối tri thức","cat_id":807,"alias":"luyen-tap-chung-trang-23-toan-7-ket-noi-tri-thuc","introtext":"","type":"event","item_id":24941,"item_type":2},"banner":[],"top_banner":"","content_expanded":[],"child_events":[{"id":"24941","title":"Luyện tập chung trang 23 Toán 7 kết nối tri thức","short_title":"Luyện tập chung trang 23","alias":"luyen-tap-chung-trang-23-toan-7-ket-noi-tri-thuc","picture":"picture/event/2022/0301/84-0_3.jpg","is_link":"0","links":"","is_hot":"0","is_all":"0","category_id":"807","ordering":"24941","parent_id":"24903"}],"parent_events":[{"id":"24903","title":"Chương I. 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