{"article_info":{"article_id":105771,"cat_id":808,"cat_title":"SGK Toán 7 - Chân trời sáng tạo","publish_time":1646721900,"cat_id2":808,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2022/0308/resize_6-6-0_3.jpg","title":"Giải bài 1 trang 24 SGK Toán 7 tập 1 - Chân trời sáng tạo","label":"Bài 1 trang 24 ","alias":"giai-bai-1-trang-24-sgk-toan-7-tap-1-chan-troi-sang-tao","introtext":"Bỏ dấu ngoặc rồi tính:","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>Bỏ dấu ngoặc rồi tính:</p>\r\n<p>a)\\(\\left( {\\frac{{ - 3}}{7}} \\right) + \\left( {\\frac{5}{6} - \\frac{4}{7}} \\right);\\)                          </p>\r\n<p>b)\\(\\frac{3}{5} - \\left( {\\frac{2}{3} + \\frac{1}{5}} \\right);\\)</p>\r\n<p>c)\\(\\left[ {\\left( {\\frac{{ - 1}}{3} + 1} \\right) - \\left( {\\frac{2}{3} - \\frac{1}{5}} \\right)} \\right];\\)                  </p>\r\n<p>d)\\(1\\frac{1}{3} + \\left( {\\frac{2}{3} - \\frac{3}{4}} \\right) - \\left( {0,8 + 1\\frac{1}{5}} \\right)\\).</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>Thực hiện phép tính theo thứ tự: ( ) =&gt;[ ]. Sau đó đến các phép tính ngoài ngoặc.</p>\r\n<p>Thực hiện phép tính bằng cách đưa các số về dạng phân số rồi quy đồng mẫu các phân số.</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>a)</p>\r\n<p>\\(\\begin{array}{l}\\left( {\\frac{{ - 3}}{7}} \\right) + \\left( {\\frac{5}{6} - \\frac{4}{7}} \\right)\\\\ = \\left( {\\frac{{ - 3}}{7}} \\right) + \\frac{5}{6} - \\frac{4}{7}\\\\ = \\left[ {\\left( {\\frac{{ - 3}}{7}} \\right) - \\frac{4}{7}} \\right] + \\frac{5}{6}\\\\ =\\frac{-7}{7}+\\frac{5}{6}\\\\=  - 1 + \\frac{5}{6}\\\\ = \\frac{{ - 1}}{6}\\end{array}\\)                          </p>\r\n<p>b)</p>\r\n<p>\\(\\begin{array}{l}\\frac{3}{5} - \\left( {\\frac{2}{3} + \\frac{1}{5}} \\right)\\\\ = \\frac{3}{5} - \\frac{2}{3} - \\frac{1}{5}\\\\ = (\\frac{3}{5} - \\frac{1}{5}) - \\frac{2}{3}\\\\ = \\frac{2}{5} - \\frac{2}{3}\\\\ = \\frac{6}{{15}} - \\frac{{10}}{{15}}\\\\ = \\frac{{ - 4}}{{15}}\\end{array}\\)</p>\r\n<p>c)</p>\r\n<p>\\(\\begin{array}{l}\\left[ {\\left( {\\frac{{ - 1}}{3}} \\right) + 1} \\right] - \\left( {\\frac{2}{3} - \\frac{1}{5}} \\right)\\\\ = \\left( {\\frac{{ - 1}}{3}} \\right) + 1 - \\frac{2}{3} + \\frac{1}{5}\\\\ = \\left( {\\frac{{ - 1}}{3} - \\frac{2}{3}} \\right) + 1 + \\frac{1}{5}\\\\ = \\frac{-3}{3}+1+\\frac{1}{5}\\\\= - 1 + 1 + \\frac{1}{5}\\\\ = \\frac{1}{5}\\end{array}\\)                  </p>\r\n<p>d)</p>\r\n<p>\\(\\begin{array}{l}1\\frac{1}{3} + \\left( {\\frac{2}{3} - \\frac{3}{4}} \\right) - \\left( {0,8 + 1\\frac{1}{5}} \\right)\\\\ = 1 + \\frac{1}{3} + \\frac{2}{3} - \\frac{3}{4} - \\left( {\\frac{4}{5} + 1 + \\frac{1}{5}} \\right)\\\\=1+\\frac{3}{3}-\\frac{3}{4}-(\\frac{5}{5}+1)\\\\ = 1 + 1 - \\frac{3}{4} - (1+1)\\\\ =  - \\frac{3}{4}\\end{array}\\).</p>","common_article":"","display_type":1,"vungoi_exam_id":"","article_type":1,"cmt_count":6,"zip_status":1,"last_modified_time":1681549106,"last_zip_time":1681549106,"zip_link":"https://offline.loigiaihay.com/articles/808/105771/105771_1659663015.zip","picture":"https://img.loigiaihay.com/picture/article/2022/0308/6-6-0_3.jpg","youtube_id":"1RLAgBwtsnw","video_start_time":"779","quizlet_id":"0","ref_article_id":0,"readmore_display_type":0,"wiki":0,"comment_url":"https://loigiaihay.com/comment/giai-bai-1-trang-24-sgk-toan-7-tap-1-chan-troi-sang-tao-c808a105771.html","origin_url":"https://loigiaihay.com/giai-bai-1-trang-24-sgk-toan-7-tap-1-chan-troi-sang-tao-c808a105771.html","relate_link":[]},"callouts":[],"relate_articles":[],"others_in_cat":[{"article_id":105772,"cat_id":808,"publish_time":1646722080,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2022/0308/resize_6-6-0_4.jpg","title":"Giải bài 2 trang 25 SGK Toán 7 tập 1 - 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