{"id":16165,"date":"2026-02-11T09:29:20","date_gmt":"2026-02-11T09:29:20","guid":{"rendered":"https:\/\/hosc.ly\/?p=16165"},"modified":"2026-02-11T09:31:40","modified_gmt":"2026-02-11T09:31:40","slug":"keo-chap-1-2-la-gi-cach-doc-keo-chap-1-2-don-gian-va-hieu-qua","status":"publish","type":"post","link":"https:\/\/hosc.ly\/?p=16165","title":{"rendered":"K\u00e8o ch\u1ea5p 1\/2 l\u00e0 g\u00ec? C\u00e1ch \u0111\u1ecdc k\u00e8o ch\u1ea5p 1\/2 \u0111\u01a1n gi\u1ea3n v\u00e0 hi\u1ec7u qu\u1ea3"},"content":{"rendered":"\n

K\u00e8o ch\u1ea5p 1\/2 (hay k\u00e8o 0.5) l\u00e0 m\u1ed9t trong nh\u1eefng m\u1ee9c ch\u1ea5p ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1 c\u01b0\u1ee3c b\u00f3ng \u0111\u00e1, \u0111\u1eb7c bi\u1ec7t th\u01b0\u1eddng xuy\u00ean xu\u1ea5t hi\u1ec7n tr\u00ean b\u1ea3ng k\u00e8o c\u1ee7a BK8<\/strong><\/a>. \u0110\u00e2y l\u00e0 lo\u1ea1i k\u00e8o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi nh\u00e0 c\u00e1i \u0111\u00e1nh gi\u00e1 c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch nh\u1ea5t \u0111\u1ecbnh gi\u1eefa hai \u0111\u1ed9i b\u00f3ng, th\u01b0\u1eddng trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed9i c\u1eeda tr\u00ean m\u1ea1nh h\u01a1n \u0111\u1ed9i c\u1eeda d\u01b0\u1edbi.<\/p>\n\n\n\n

K\u00e8o ch\u1ea5p 1\/2 gi\u00fap c\u00e2n b\u1eb1ng s\u1ee9c m\u1ea1nh gi\u1eefa hai \u0111\u1ed9i tr\u00ean l\u00fd thuy\u1ebft v\u00e0 t\u1ea1o s\u1ef1 c\u00f4ng b\u1eb1ng trong m\u1ed7i l\u01b0\u1ee3t \u0111\u1eb7t c\u01b0\u1ee3c. Nh\u00e0 c\u00e1i kh\u00f4ng x\u00e9t \u0111\u1ebfn y\u1ebfu t\u1ed1 s\u00e2n b\u00e3i hay \u0111\u1ed9i ch\u1ee7 nh\u00e0, \u0111\u1ed9i kh\u00e1ch m\u00e0 t\u1eadp trung v\u00e0o th\u1ef1c l\u1ef1c t\u1ed5ng qu\u00e1t c\u1ee7a hai \u0111\u1ed9i.<\/p>\n\n\n\n

Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, m\u1ee9c ch\u1ea5p 1\/2 \u0111\u01b0\u1ee3c \u0111\u01b0a ra khi hai \u0111\u1ed9i c\u00f3 s\u1ef1 c\u00e2n b\u1eb1ng t\u01b0\u01a1ng \u0111\u1ed1i nh\u01b0ng \u0111\u1ed9i ch\u1ee7 nh\u00e0 c\u00f3 ch\u00fat l\u1ee3i th\u1ebf s\u00e2n b\u00e3i. V\u00ec v\u1eady, m\u1ee9c ch\u1ea5p n\u00e0y th\u01b0\u1eddng xuy\u00ean xu\u1ea5t hi\u1ec7n \u1edf nh\u1eefng gi\u1ea3i \u0111\u1ea5u l\u1edbn.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

H\u01b0\u1edbng d\u1eabn lu\u1eadt ch\u01a1i k\u00e8o ch\u1ea5p 1\/2<\/strong><\/h2>\n\n\n\n

K\u00e8o ch\u1ea5p 1\/2 c\u00f3 c\u00e1ch t\u00ednh \u0111\u01a1n gi\u1ea3n h\u01a1n nhi\u1ec1u lo\u1ea1i k\u00e8o ch\u1ea5p kh\u00e1c. Khi \u0111\u1eb7t c\u01b0\u1ee3c m\u1ee9c ch\u1ea5p n\u00e0y, ch\u1ec9 c\u00f3 hai k\u1ebft qu\u1ea3 x\u1ea3y ra: th\u1eafng to\u00e0n b\u1ed9 ti\u1ec1n ho\u1eb7c thua to\u00e0n b\u1ed9 ti\u1ec1n.<\/p>\n\n\n\n

Quy t\u1eafc th\u1eafng thua trong k\u00e8o ch\u1ea5p 1\/2<\/strong><\/h3>\n\n\n\n

D\u01b0\u1edbi \u0111\u00e2y l\u00e0 lu\u1eadt ch\u01a1i c\u01a1 b\u1ea3n m\u00e0 ng\u01b0\u1eddi m\u1edbi c\u1ea7n n\u1eafm r\u00f5:<\/p>\n\n\n\n

    \n
  • Tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed9i c\u1eeda tr\u00ean th\u1eafng:<\/strong>
    <\/strong> Ng\u01b0\u1eddi \u0111\u1eb7t c\u01b0\u1ee3c \u0111\u1ed9i c\u1eeda tr\u00ean s\u1ebd th\u1eafng v\u00e0 nh\u1eadn ti\u1ec1n theo t\u1ef7 l\u1ec7 nh\u00e0 c\u00e1i \u0111\u01b0a ra. Ng\u01b0\u1eddi c\u01b0\u1ee3c \u0111\u1ed9i c\u1eeda d\u01b0\u1edbi s\u1ebd thua to\u00e0n b\u1ed9 ti\u1ec1n c\u01b0\u1ee3c.<\/li>\n\n\n\n
  • Tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed9i c\u1eeda tr\u00ean h\u00f2a ho\u1eb7c thua:<\/strong>
    <\/strong> Ng\u01b0\u1eddi \u0111\u1eb7t c\u1eeda tr\u00ean thua to\u00e0n b\u1ed9 ti\u1ec1n. Ng\u01b0\u1eddi \u0111\u1eb7t c\u1eeda d\u01b0\u1edbi th\u1eafng to\u00e0n b\u1ed9 ti\u1ec1n theo t\u1ef7 l\u1ec7 k\u00e8o t\u01b0\u01a1ng \u1ee9ng.<\/li>\n<\/ul>\n\n\n\n

    K\u00e8o ch\u1ea5p 1\/2 kh\u00f4ng c\u00f3 tr\u01b0\u1eddng h\u1ee3p h\u00f2a ti\u1ec1n nh\u01b0 c\u00e1c k\u00e8o ch\u1ea5p nguy\u00ean tr\u00e1i. \u0110i\u1ec1u n\u00e0y gi\u00fap ng\u01b0\u1eddi ch\u01a1i d\u1ec5 \u0111\u01b0a ra l\u1ef1a ch\u1ecdn h\u01a1n nh\u01b0ng c\u0169ng \u0111\u00f2i h\u1ecfi ph\u1ea3i ph\u00e2n t\u00edch k\u1ef9 phong \u0111\u1ed9 hai \u0111\u1ed9i \u0111\u1ec3 gi\u1ea3m r\u1ee7i ro.<\/p>\n\n\n\n

    C\u00e1ch t\u00ednh ti\u1ec1n th\u1eafng thua \u1edf k\u00e8o ch\u1ea5p 1\/2<\/strong><\/h3>\n\n\n\n

    Ng\u01b0\u1eddi ch\u01a1i \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n:<\/p>\n\n\n\n

    Ti\u1ec1n th\u1eafng = Ti\u1ec1n c\u01b0\u1ee3c x T\u1ef7 l\u1ec7 c\u01b0\u1ee3c c\u1ee7a nh\u00e0 c\u00e1i.<\/p>\n\n\n\n

    Ti\u1ec1n thua = M\u1ea5t to\u00e0n b\u1ed9 s\u1ed1 v\u1ed1n c\u01b0\u1ee3c ban \u0111\u1ea7u.<\/p>\n\n\n\n

    V\u00ed d\u1ee5 chi ti\u1ebft v\u1ec1 k\u00e8o ch\u1ea5p \u00bd<\/strong><\/h2>\n\n\n\n
    \"\"<\/figure>\n\n\n\n

    \u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n, h\u00e3y xem v\u00ed d\u1ee5 sau v\u1edbi tr\u1eadn \u0111\u1ea5u gi\u1eefa Uruguay v\u00e0 Egypt.<\/p>\n\n\n\n

    Trong b\u1ea3ng k\u00e8o, Uruguay ch\u1ea5p Egypt 0.5 (t\u1ee9c ch\u1ea5p 1\/2). T\u1ef7 l\u1ec7 \u0103n d\u00e0nh cho Uruguay l\u00e0 0.72 v\u00e0 c\u1ee7a Egypt l\u00e0 0.8.<\/p>\n\n\n\n

    Gi\u1ea3 s\u1eed ng\u01b0\u1eddi ch\u01a1i \u0111\u1eb7t 1.000.000 VN\u0110 v\u00e0o \u0111\u1ed9i Uruguay:<\/p>\n\n\n\n

    Tr\u01b0\u1eddng h\u1ee3p 1: Uruguay th\u1eafng<\/strong><\/h3>\n\n\n\n
      \n
    • Ng\u01b0\u1eddi ch\u01a1i \u0111\u1eb7t c\u1eeda Uruguay s\u1ebd th\u1eafng.<\/li>\n\n\n\n
    • S\u1ed1 ti\u1ec1n nh\u1eadn \u0111\u01b0\u1ee3c:
      1.000.000 x 0.72 = 720.000 VN\u0110 l\u1ee3i nhu\u1eadn.<\/li>\n<\/ul>\n\n\n\n

      N\u1ebfu \u0111\u1eb7t v\u00e0o Egypt, ng\u01b0\u1eddi ch\u01a1i s\u1ebd m\u1ea5t to\u00e0n b\u1ed9 1.000.000 VN\u0110.<\/p>\n\n\n\n

      Tr\u01b0\u1eddng h\u1ee3p 2: Uruguay h\u00f2a ho\u1eb7c thua<\/strong><\/h3>\n\n\n\n
        \n
      • Ng\u01b0\u1eddi \u0111\u1eb7t Uruguay s\u1ebd thua to\u00e0n b\u1ed9 1.000.000 VN\u0110.<\/li>\n\n\n\n
      • N\u1ebfu \u0111\u1eb7t Egypt:
        S\u1ed1 ti\u1ec1n th\u1eafng l\u00e0 1.000.000 x 0.8 = 800.000 VN\u0110 l\u1ee3i nhu\u1eadn.<\/li>\n<\/ul>\n\n\n\n

        Qua v\u00ed d\u1ee5 n\u00e0y c\u00f3 th\u1ec3 th\u1ea5y k\u00e8o ch\u1ea5p 1\/2 mang \u0111\u1ebfn t\u1ef7 l\u1ec7 r\u1ee7i ro r\u00f5 r\u00e0ng: th\u1eafng \u0111\u1ee7 ho\u1eb7c thua \u0111\u1ee7, kh\u00f4ng c\u00f3 ph\u00e2n chia n\u1eeda ti\u1ec1n. Do \u0111\u00f3 ng\u01b0\u1eddi ch\u01a1i c\u1ea7n ph\u00e2n t\u00edch k\u1ef9 tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh \u0111\u1eb7t c\u01b0\u1ee3c.<\/p>\n\n\n\n

        \u00dd ngh\u0129a c\u1ee7a b\u1ea3ng k\u00e8o ch\u1ea5p 1\/2<\/strong><\/h2>\n\n\n\n

        B\u1ea3ng k\u00e8o ch\u1ea5p 1\/2 tr\u00ean BK8 kh\u00f4ng ch\u1ec9 th\u1ec3 hi\u1ec7n m\u1ee9c ch\u1ea5p m\u00e0 c\u00f2n \u0111\u01b0a ra nhi\u1ec1u th\u00f4ng tin gi\u00fap ng\u01b0\u1eddi ch\u01a1i \u0111\u00e1nh gi\u00e1 tr\u1eadn \u0111\u1ea5u hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n\n\n\n

        \"\"<\/figure>\n\n\n\n

        Khi quan s\u00e1t b\u1ea3ng k\u00e8o, t\u1ef7 l\u1ec7 c\u01b0\u1ee3c \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng. Th\u00f4ng th\u01b0\u1eddng:<\/p>\n\n\n\n

          \n
        • T\u1ef7 l\u1ec7 \u0103n cao h\u01a1n \u0111i k\u00e8m x\u00e1c su\u1ea5t chi\u1ebfn th\u1eafng th\u1ea5p h\u01a1n.<\/li>\n\n\n\n
        • T\u1ef7 l\u1ec7 \u0103n th\u1ea5p th\u1ec3 hi\u1ec7n \u0111\u1ed9i b\u00f3ng \u0111\u00f3 c\u00f3 kh\u1ea3 n\u0103ng chi\u1ebfn th\u1eafng cao h\u01a1n.<\/li>\n<\/ul>\n\n\n\n

          \u0110i\u1ec1u n\u00e0y gi\u00fap ng\u01b0\u1eddi ch\u01a1i d\u1ef1 \u0111o\u00e1n xu h\u01b0\u1edbng tr\u1eadn \u0111\u1ea5u, \u0111\u1eb7c bi\u1ec7t trong tr\u01b0\u1eddng h\u1ee3p hai \u0111\u1ed9i c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch l\u1edbn v\u1ec1 phong \u0111\u1ed9 ho\u1eb7c \u0111\u1eb3ng c\u1ea5p.<\/p>\n\n\n\n

          \u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi ch\u01a1i nhi\u1ec1u kinh nghi\u1ec7m, b\u1ea3ng k\u00e8o ch\u1ea5p 1\/2 l\u00e0 m\u1ed9t trong nh\u1eefng c\u01a1 s\u1edf quan tr\u1ecdng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1:<\/p>\n\n\n\n

            \n
          • S\u1ee9c m\u1ea1nh th\u1ef1c t\u1ebf c\u1ee7a \u0111\u1ed9i b\u00f3ng.<\/li>\n\n\n\n
          • Xu h\u01b0\u1edbng nh\u00e0 c\u00e1i mu\u1ed1n d\u1eabn ng\u01b0\u1eddi ch\u01a1i theo h\u01b0\u1edbng n\u00e0o.<\/li>\n\n\n\n
          • C\u01a1 h\u1ed9i ki\u1ebfm l\u1ee3i nhu\u1eadn \u1edf c\u00e1c k\u00e8o ph\u1ee5 ho\u1eb7c k\u00e8o t\u00e0i x\u1ec9u.<\/li>\n<\/ul>\n\n\n\n

            K\u1ebft h\u1ee3p b\u1ea3ng k\u00e8o ch\u1ea5p v\u1edbi ph\u00e2n t\u00edch phong \u0111\u1ed9, \u0111\u1ed9i h\u00ecnh v\u00e0 c\u00e1c lo\u1ea1i k\u00e8o kh\u00e1c s\u1ebd gi\u00fap ng\u01b0\u1eddi ch\u01a1i \u0111\u01b0a ra l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u nh\u1ea5t.<\/p>\n\n\n\n

            K\u1ebft lu\u1eadn<\/strong><\/h2>\n\n\n\n

            Qua b\u00e0i vi\u1ebft tr\u00ean, ng\u01b0\u1eddi ch\u01a1i \u0111\u00e3 hi\u1ec3u r\u00f5 k\u00e8o ch\u1ea5p 1\/2 l\u00e0 g\u00ec, c\u00e1ch \u0111\u1ecdc k\u00e8o v\u00e0 c\u00e1ch t\u00ednh ti\u1ec1n th\u1eafng thua chi ti\u1ebft. \u0110\u00e2y l\u00e0 lo\u1ea1i k\u00e8o \u0111\u01a1n gi\u1ea3n, d\u1ec5 ti\u1ebfp c\u1eadn nh\u01b0ng v\u1eabn \u0111\u00f2i h\u1ecfi ng\u01b0\u1eddi ch\u01a1i ph\u1ea3i ph\u00e2n t\u00edch k\u1ef9 m\u1edbi c\u00f3 th\u1ec3 \u0111\u1eb7t c\u01b0\u1ee3c hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n

            H\u00e3y ti\u1ebfp t\u1ee5c t\u00ecm hi\u1ec3u th\u00eam c\u00e1c lo\u1ea1i k\u00e8o kh\u00e1c \u0111\u1ec3 n\u00e2ng cao kh\u1ea3 n\u0103ng c\u00e1 c\u01b0\u1ee3c v\u00e0 \u0111\u01b0a ra l\u1ef1a ch\u1ecdn th\u00f4ng minh nh\u1ea5t trong m\u1ed7i tr\u1eadn \u0111\u1ea5u.<\/p>\n","protected":false},"excerpt":{"rendered":"

            K\u00e8o ch\u1ea5p 1\/2 (hay k\u00e8o 0.5) l\u00e0 m\u1ed9t trong nh\u1eefng m\u1ee9c ch\u1ea5p ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1 c\u01b0\u1ee3c b\u00f3ng \u0111\u00e1,<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[134],"tags":[],"class_list":["post-16165","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/hosc.ly\/index.php?rest_route=\/wp\/v2\/posts\/16165","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hosc.ly\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hosc.ly\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hosc.ly\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hosc.ly\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16165"}],"version-history":[{"count":1,"href":"https:\/\/hosc.ly\/index.php?rest_route=\/wp\/v2\/posts\/16165\/revisions"}],"predecessor-version":[{"id":16169,"href":"https:\/\/hosc.ly\/index.php?rest_route=\/wp\/v2\/posts\/16165\/revisions\/16169"}],"wp:attachment":[{"href":"https:\/\/hosc.ly\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hosc.ly\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hosc.ly\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}