{"id":427,"date":"2019-07-15T20:49:35","date_gmt":"2019-07-15T13:49:35","guid":{"rendered":"http:\/\/www.truyenthong.edu.vn\/?p=427"},"modified":"2019-07-15T20:49:35","modified_gmt":"2019-07-15T13:49:35","slug":"lich-su-ra-doi-cua-cac-ky-hieu-toan-hoc-co-ban","status":"publish","type":"post","link":"https:\/\/truyenthong.edu.vn\/sanpham\/2019\/07\/15\/lich-su-ra-doi-cua-cac-ky-hieu-toan-hoc-co-ban\/","title":{"rendered":"L\u1ecbch s\u1eed ra \u0111\u1eddi c\u1ee7a c\u00e1c k\u00fd hi\u1ec7u to\u00e1n h\u1ecdc c\u01a1 b\u1ea3n"},"content":{"rendered":"\n<p>Ngay t\u1eeb khi b\u1eaft \u0111\u1ea7u l\u00e0m quen v\u1edbi c\u00e1c con s\u1ed1, ch\u00fang ta c\u0169ng \u0111\u00e3 bi\u1ebft \u0111\u1ebfn d\u1ea5u c\u1ed9ng (+), d\u1ea5u tr\u1eeb (-). Sau n\u00e0y, khi l\u1edbn h\u01a1n, ch\u00fang ta bi\u1ebft th\u00eam d\u1ea5u nh\u00e2n (x,*,<strong>.<\/strong>), d\u1ea5u chia (<strong>:<\/strong>,<strong>\/<\/strong>,\u00f7) c\u00f9ng v\u1edbi r\u1ea5t nhi\u1ec1u k\u00fd hi\u1ec7u to\u00e1n h\u1ecdc kh\u00e1c nhau. Nh\u01b0ng c\u00f3 th\u1ec3 th\u1ea5y c\u00e1c k\u00fd hi\u1ec7u quen thu\u1ed9c v\u00e0 th\u00f4ng d\u1ee5ng v\u1eabn l\u00e0 +, -, x, <strong>:<\/strong>.\u00a0<\/p>\n\n\n<!--more-->\n\n\n<p>\u1ede tr\u01b0\u1eddng, b\u1ea1n g\u1eb7p c\u00e1c k\u00fd hi\u1ec7u n\u00e0y r\u1ea5t nhi\u1ec1u, kh\u00f4ng ch\u1ec9 \u1edf m\u00f4n To\u00e1n m\u00e0 c\u00f2n r\u1ea5t nhi\u1ec1u m\u00f4n h\u1ecdc kh\u00e1c nh\u01b0 \u0110\u1ecba l\u00fd, V\u1eadt L\u00fd, H\u00f3a h\u1ecdc, Sinh h\u1ecdc, C\u00f4ng ngh\u1ec7,&#8230;Nh\u01b0ng b\u1ea1n c\u00f3 t\u1eebng th\u1eafc m\u1eafc nh\u1eefng k\u00fd hi\u1ec7u \u0111\u00f3 t\u1eeb \u0111\u00e2u m\u00e0 c\u00f3? Ai l\u00e0 ng\u01b0\u1eddi ph\u00e1t minh ra ch\u00fang? T\u1ea1i sao ch\u00fang l\u1ea1i xu\u1ea5t hi\u1ec7n v\u00e0 c\u00f3 m\u1ee5c \u0111\u00edch g\u00ec? H\u1ea7u nh\u01b0 c\u00e1c gi\u00e1o vi\u00ean ch\u1ec9 gi\u1ea3ng d\u1ea1y cho b\u1ea1n \u00fd ngh\u0129a v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng ch\u00fang hi\u1ec7u qu\u1ea3 nh\u1ea5t trong h\u1ecdc t\u1eadp m\u00e0 g\u1ea7n nh\u01b0 b\u1ecf qu\u00ean m\u1ea5t l\u00fd do c\u00f3 \u0111\u01b0\u1ee3c ch\u00fang. H\u1ecdc sinh ch\u1ec9 s\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u v\u00e0 xem \u0111\u00f3 l\u00e0 \u0111i\u1ec1u t\u1ea5t nhi\u00ean m\u00e0 kh\u00f4ng bi\u1ebft r\u1eb1ng: kh\u00f4ng c\u00f3 c\u00e1i g\u00ec t\u1ef1 nhi\u00ean m\u00e0 c\u00f3. S\u1ef1 ra \u0111\u1eddi c\u1ee7a c\u00e1c k\u00fd hi\u1ec7u l\u00e0 s\u1ef1 ki\u1ec7n quan tr\u1ecdng trong l\u1ecbch s\u1eed to\u00e1n h\u1ecdc, g\u00f3p ph\u1ea7n kh\u00f4ng nh\u1ecf trong vi\u1ec7c x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c kh\u00e1i ni\u1ec7m, \u0111\u1ecbnh l\u00fd&#8230;cho \u0111\u1ebfn t\u1eadn ng\u00e0y h\u00f4m nay.&nbsp;<\/p>\n\n\n<p>V\u00ec v\u1eady, b\u00e0i lu\u1eadn n\u00e0y s\u1ebd gi\u00fap c\u00e1c b\u1ea1n hi\u1ec3u h\u01a1n v\u1ec1 l\u1ecbch s\u1eed ra \u0111\u1eddi v\u00e0 gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c k\u00fd hi\u1ec7u +, -, x, <strong>:<\/strong>.\u00a0<\/p>\n\n\n<p>Th\u00f4ng tin v\u1ec1 s\u1ea3n ph\u1ea9m:<\/p>\n\n\n<ul class=\"wp-block-list\"><li>H\u1ecdc ph\u1ea7n: Ho\u1ea1t \u0111\u1ed9ng Tr\u1ea3i nghi\u1ec7m s\u00e1ng t\u1ea1o<\/li><li>N\u0103m: 2019<\/li><li>T\u00e1c gi\u1ea3: Tr\u1ea7n Th\u1ecb Thu H\u01b0\u1eddng<\/li><li>T\u1ea3i v\u1ec1 (pdf): <a href=\"https:\/\/drive.google.com\/file\/d\/1-8-MBzoCYF5UR0JSoQyrRTr7Lluwtgj1\/view?usp=sharing\">B\u1ea3n pdf<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Ngay t\u1eeb khi b\u1eaft \u0111\u1ea7u l\u00e0m quen v\u1edbi c\u00e1c con s\u1ed1, ch\u00fang ta c\u0169ng \u0111\u00e3 bi\u1ebft \u0111\u1ebfn d\u1ea5u c\u1ed9ng (+), d\u1ea5u tr\u1eeb (-). Sau n\u00e0y, khi l\u1edbn h\u01a1n, ch\u00fang ta bi\u1ebft th\u00eam d\u1ea5u nh\u00e2n (x,*,.), d\u1ea5u chia (:,\/,\u00f7) c\u00f9ng v\u1edbi r\u1ea5t nhi\u1ec1u k\u00fd hi\u1ec7u to\u00e1n h\u1ecdc kh\u00e1c nhau. Nh\u01b0ng c\u00f3 th\u1ec3 th\u1ea5y c\u00e1c k\u00fd hi\u1ec7u [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[135,165],"class_list":["post-427","post","type-post","status-publish","format-standard","hentry","category-hoat-dong-trai-nghiem","tag-so-hoc","tag-trai-nghiem"],"_links":{"self":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts\/427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/comments?post=427"}],"version-history":[{"count":0,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts\/427\/revisions"}],"wp:attachment":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/media?parent=427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/categories?post=427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/tags?post=427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}