Trong b\u00e0i vi\u1ebft tr\u01b0\u1edbc m\u00ecnh \u0111\u00e3 gi\u1edbi thi\u1ec7u 3 b\u00ed k\u00edp t\u00ednh l\u00f4 \u0111\u1ec1 v\u1edbi t\u1ef7 l\u1ec7 ch\u00ednh x\u00e1c c\u1ef1c cao n\u0103m. Trong b\u00e0i vi\u1ebft n\u00e0y m\u00ecnh ti\u1ebfp t\u1ee5c gi\u1edbi thi\u1ec7u 3 b\u00ed k\u00edp c\u00f2n l\u1ea1i.<\/p>\n
6 c\u00e1ch t\u00ednh l\u00f4 \u0111\u1ec1 chu\u1ea9n x\u00e1c nh\u1ea5t n\u0103m<\/h2>\n
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