T\u1ea5t c\u1ea3 c\u00e1c ph\u00e2n s\u1ed1 \u0111\u1ec1u l\u00e0 c\u00e1c s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n, ho\u1eb7c s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n. C\u00e1c s\u1ed1 l\u1ebb c\u00f3 m\u1ed9t s\u1ed1 h\u1eefu h\u1ea1n c\u00e1c ch\u1eef s\u1ed1 g\u1ecdi l\u00e0 s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n, v\u00ed nh\u01b0 ph\u00e2n s\u1ed1 1\/4 = 0,25. C\u00f2n s\u1ed1 33\/99 l\u1ea1i l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n, s\u1ed1 c\u00e1c ch\u1eef s\u1ed1 trong s\u1ed1 l\u1ebb n\u00e0y l\u00e0 v\u00f4 h\u1ea1n, trong \u0111\u00f3 s\u1ed1 3 \u0111\u01b0\u1ee3c l\u1eb7p \u0111i l\u1eb7p l\u1ea1i v\u00f4 s\u1ed1 l\u1ea7n. Ng\u01b0\u1eddi ta g\u1ecdi nh\u00f3m s\u1ed1 3 l\u00e0 nh\u00f3m ch\u1eef s\u1ed1 tu\u1ea7n ho\u00e0n.<\/p>\n\n\n\n
Vi\u1ec7c bi\u1ec3u di\u1ec5n m\u1ed9t s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t ph\u00e2n s\u1ed1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n kh\u00e1 \u0111\u01a1n gi\u1ea3n; ch\u1ec9 c\u1ea7n l\u1ea5y nh\u00f3m ch\u1eef s\u1ed1 sau d\u1ea5u ph\u1ea3y l\u00e0m t\u1eed s\u1ed1 c\u00f2n l\u1ea5y s\u1ed1 10n l\u00e0m m\u1eabu s\u1ed1 (n l\u00e0 s\u1ed1 ch\u1eef s\u1ed1 sau d\u1ea5u ph\u1ea3y th\u1eadp ph\u00e2n)<\/p>\n\n\n\n
V\u00ed d\u1ee5 s\u1ed1 0,4713 = 4713\/10000<\/p>\n\n\n\n
Th\u1ebf c\u00f2n v\u1edbi c\u00e1c s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n th\u00ec s\u1ebd ra sao?<\/p>\n\n\n\n
Tho\u1ea1t nh\u00ecn th\u00ec v\u1ea5n \u0111\u1ec1 tr\u00f4ng c\u00f3 v\u1ebb ph\u1ee9c t\u1ea1p nh\u01b0ng n\u1ebfu n\u1eafm \u0111\u01b0\u1ee3c quy t\u1eafc th\u00ec vi\u1ec7c bi\u1ec3u di\u1ec5n m\u1ed9t s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 c\u0169ng kh\u00e1 \u0111\u01a1n gi\u1ea3n.<\/p>\n\n\n\n
Tr\u01b0\u1edbc h\u1ebft ta x\u00e9t c\u00e1c v\u00ed d\u1ee5: 0,333\u2026 = 3\/9 = 1\/3 , 0,212121\u2026 = 21\/99 = 7\/33 0,324324324 \u2026= 324\/999 = 36\/111<\/p>\n\n\n\n
T\u1eeb \u0111\u00f3 ta c\u00f3 th\u1ec3 r\u00fat ra quy lu\u1eadt: L\u1ea5y nh\u00f3m s\u1ed1 tu\u1ea7n ho\u00e0n l\u00e0m t\u1eed s\u1ed1, c\u00f2n nh\u00f3m s\u1ed1 g\u1ed3m c\u00e1c con s\u1ed1 9: 99\u20269 l\u00e0m m\u1eabu s\u1ed1, s\u1ed1 ch\u1eef s\u1ed1 9 trong nh\u00f3m ph\u1ee5 thu\u1ed9c s\u1ed1 c\u00e1c con s\u1ed1 trong nh\u00f3m s\u1ed1 tu\u1ea7n ho\u00e0n. C\u00e1c b\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 m\u00ecnh ki\u1ec3m tra t\u00ednh \u0111\u00fang \u0111\u1eafn c\u1ee7a quy t\u1eafc n\u00e0y.<\/p>\n\n\n\n
N\u1ebfu g\u1eb7p tr\u01b0\u1eddng h\u1ee3p m\u1ed9t s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1ed7n h\u1ee3p g\u1ed3m hai ph\u1ea7n s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n v\u00e0 ph\u1ea7n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n, tr\u01b0\u1edbc h\u1ebft ta c\u1eaft s\u1ed1 l\u1ebb th\u00e0nh t\u1ed5ng c\u1ee7a hai ph\u1ea7n, m\u1ed9t ph\u1ea7n l\u00e0 m\u1ed9t s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n v\u00e0 m\u1ed9t ph\u1ea7n l\u00e0 s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n. V\u00ed d\u1ee5: X\u00e9t s\u1ed1 3, 14212121\u2026 3, 14212121 = 3,14 + 0,212121\/102= 3,14 + 21\/99 x 1\/102 = 314\/100 + 7\/3300 = 10369\/3300<\/p>\n\n\n\n
M\u1eddi c\u00e1c b\u1ea1n th\u1eed bi\u1ebfn \u0111\u1ed5i c\u00e1c s\u1ed1 sau \u0111\u00e2y th\u00e0nh ph\u00e2n s\u1ed1: 1,42272727\u2026 =? 0,00313131\u2026 = ? 2,043521521521\u2026=?<\/p>\n\n\n\n
T\u1eeb kho\u00e1: S\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n; S\u1ed1 l\u1ebb th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n; Nh\u00f3m s\u1ed1 tu\u1ea7n ho\u00e0n; Ph\u00e2n s\u1ed1.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
T\u1ea5t c\u1ea3 c\u00e1c ph\u00e2n s\u1ed1 \u0111\u1ec1u l\u00e0 c\u00e1c s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n, ho\u1eb7c s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n. C\u00e1c s\u1ed1 l\u1ebb c\u00f3 m\u1ed9t s\u1ed1 h\u1eefu h\u1ea1n c\u00e1c ch\u1eef s\u1ed1 g\u1ecdi l\u00e0 s\u1ed1 l\u1ebb th\u1eadp ph\u00e2n h\u1eefu h\u1ea1n, v\u00ed nh\u01b0 ph\u00e2n s\u1ed1 1\/4 = 0,25. C\u00f2n s\u1ed1 33\/99 l\u1ea1i l\u00e0 s\u1ed1 th\u1eadp […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,9],"tags":[],"class_list":["post-7517","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=7517"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7517\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}