{"id":13606,"date":"2021-11-27T12:58:26","date_gmt":"2021-11-27T05:58:26","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=13606"},"modified":"2021-11-27T12:58:27","modified_gmt":"2021-11-27T05:58:27","slug":"co-so-dem-cua-chung-ta-da-bat-dau-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/co-so-dem-cua-chung-ta-da-bat-dau-nhu-the-nao\/","title":{"rendered":"C\u01a1 s\u1ed1 \u0111\u1ebfm c\u1ee7a ch\u00fang ta \u0111\u00e3 b\u1eaft \u0111\u1ea7u nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 1 &#8211; Arkady Leokum<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 hai xu. N\u1ebfu cho b\u1ea1n th\u00eam hai xu n\u1eefa th\u00ec b\u1ea1n bi\u1ebft ngay m\u00ecnh c\u00f3 b\u1ed1n xu. Nh\u01b0ng b\u1ea1n c\u00f3 hi\u1ec3u r\u1eb1ng \u0111\u1ec3 \u0111i \u0111\u1ebfn ch\u1ed7 b\u1ea1n \u201cbi\u1ebft ngay\u201d m\u00ecnh c\u00f3 b\u1ed1n xu, nh\u00e2n lo\u1ea1i \u0111\u00e3 ph\u1ea3i m\u1ea5t bao nhi\u00eau th\u1eddi gian kh\u00f4ng? H\u00e0ng tri\u1ec7u n\u0103m ch\u1edb kh\u00f4ng \u00edt \u0111\u00e2u. B\u1edfi m\u1ed9t trong nh\u1eefng \u0111i\u1ec1u kh\u00f3 d\u1ea1y cho con n\u00edt nh\u1ea5t ch\u00ednh l\u00e0 d\u1ea1y cho ch\u00fang kh\u00e1i ni\u1ec7m con s\u1ed1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1eddi x\u1eeda th\u1eddi x\u01b0a khi ng\u01b0\u1eddi ta mu\u1ed1n n\u00f3i m\u00ecnh c\u00f3 bao nhi\u00eau con gia s\u00fac, h\u1ecd \u0111\u00e2u c\u00f3 th\u1ec3 kh\u01a1i kh\u01a1i n\u00f3 n\u0103m, b\u1ea3y, m\u01b0\u1eddi\u2026 con. Ch\u1ec9 v\u00ec h\u1ecd \u0111\u00e2u c\u00f3 h\u1ec7 th\u1ed1ng s\u1ed1 \u0111\u1ebfm! Mu\u1ed1n di\u1ec5n t\u1ea3 con s\u1ed1, h\u1ecd ph\u1ea3i v\u1ea5t v\u1ea3 nh\u1eb7t t\u1eebng vi\u00ean s\u1ecfi, m\u1ed7i vi\u00ean t\u01b0\u1ee3ng tr\u01b0ng cho m\u1ed9t con, r\u1ed3i b\u1ecf v\u00e0o c\u00e1i t\u00fai. C\u00e0ng c\u00f3 nhi\u1ec1u s\u1ecfi h\u1ecd c\u00e0ng c\u00f3 nhi\u1ec1u gia s\u00fac. V\u00e0 ch\u1ec9 bi\u1ebft v\u1eady th\u00f4i ch\u1ee9 kh\u00f4ng bi\u1ebft \u0111\u01b0\u1ee3c m\u00ecnh c\u00f3 m\u1ea5y ch\u1ee5c, m\u1ea5y tr\u0103m. T\u1eeb \u201ccalculate\u201d (t\u00ednh to\u00e1n) c\u00f3 ngu\u1ed3n g\u1ed1c ti\u1ebfng La tinh l\u00e0 \u201ccalculus\u201d c\u00f3 ngh\u0129a l\u00e0 h\u00f2n s\u1ecfi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 sau thay v\u00ec h\u00f2n s\u1ecfi, h\u1ecd d\u00f9ng th\u1ebb, d\u00f9ng v\u1ea1ch \u0111\u1ec3 \u0111\u1ebfm, \u0111\u1ec3 t\u00ednh to\u00e1n. C\u1ee9 m\u1ed7i v\u1ea1ch hay th\u1ebb l\u00e0 m\u1ed9t con v\u1eadt h\u1ecd mu\u1ed1n \u0111\u1ebfm. Nh\u01b0ng h\u1ecd v\u1eabn kh\u00f4ng c\u00f3 t\u1eeb ng\u1eef \u0111\u1ec3 n\u00f3i t\u00ean con s\u1ed1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc k\u1ebf ti\u1ebfp trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng s\u1ed1 \u0111\u1ebfm c\u00f3 l\u1ebd l\u00e0 d\u00f9ng ng\u00f3n tay. Trong ti\u1ebfng Anh ng\u00e0y nay c\u00f3 t\u1eeb \u201cdigit\u201d (con s\u1ed1) l\u00e0 do g\u1ed1c La tinh \u201cdigitus\u201d c\u00f3 ngh\u0129a l\u00e0 ng\u00f3n tay. V\u00ec ta c\u00f3 m\u01b0\u1eddi ng\u00f3n tay n\u00ean ta ti\u1ebfn t\u1edbi ch\u1ed7 c\u01a1 s\u1ed1 \u0111\u1ebfm th\u1eadp ph\u00e2n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0ng ng\u00e0y x\u01b0a kh\u00f4ng c\u00f3 h\u1ec7 th\u1ed1ng c\u01a1 s\u1ed1 \u0111\u01b0\u1ee3c d\u00f9ng ph\u1ed5 bi\u1ebfn r\u1ed9ng r\u00e3i kh\u1eafp n\u01a1i. C\u00f3 n\u01a1i d\u00f9ng c\u01a1 s\u1ed1 12, c\u00f3 n\u01a1i d\u00f9ng c\u01a1 s\u1ed1 20 v\u00e0 c\u00f3 n\u01a1i d\u00f9ng c\u01a1 s\u1ed1 2, 5, 8. C\u01a1 s\u1ed1 \u0111\u1ebfm do ng\u01b0\u1eddi La M\u00e3 \u0111\u1eb7t ra c\u00e1ch nay 2000 n\u0103m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i t\u1ea1i ch\u00e2u \u00c2u m\u00e3i cho \u0111\u1ebfn th\u1ebf k\u1ef7 XVI. Th\u1eadt ra ng\u00e0y nay ta v\u1eabn d\u00f9ng c\u01a1 s\u1ed1 n\u00e0y cho \u0111\u1ed3ng h\u1ed3, 60 gi\u00e2y l\u00e0 m\u1ed9t ph\u00fat, 60 ph\u00fat l\u00e0 m\u1ed9t gi\u1edd. H\u1ec7 th\u1ed1ng n\u00e0y qu\u00e1 ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 th\u1ed1ng c\u01a1 s\u1ed1 \u0111\u1ebfm ta d\u00f9ng ng\u00e0y nay l\u00e0 c\u1ee7a ng\u01b0\u1eddi \u1ea4n \u0111\u1ed9 ngh\u0129 ra c\u00e1ch nay c\u1ea3 ng\u00e0n n\u0103m r\u1ed3i v\u00e0 do nh\u1eefng th\u01b0\u01a1ng nh\u00e2n du nh\u1eadp v\u00e0o ch\u00e2u \u00c2u v\u00e0 ph\u1ed5 bi\u1ebfn r\u1ed9ng r\u00e3i t\u1ea1i \u0111\u00f3 c\u0169ng \u0111\u00e3 h\u01a1n 900 n\u0103m. Trong h\u1ec7 th\u1ed1ng \u0111\u1ebfm n\u00e0y ch\u1ec9 c\u00f3 9 ch\u1eef s\u1ed1 v\u00e0 \u0111\u1ec3 di\u1ec5n t\u1ea3 \u00fd t\u01b0\u1edfng kh\u00f4ng c\u00f3 g\u00ec th\u00ec d\u00f9ng k\u00fd hi\u1ec7u 0 (z\u00e9ro). V\u1edbi 9 ch\u1eef s\u1ed1 v\u00e0 k\u00fd hi\u1ec7u 0 ng\u01b0\u1eddi ta mu\u1ed1n n\u00f3i b\u1ea5t c\u1ee9 s\u1ed1 n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c n\u1ebfu ra \u00e1p d\u1ee5ng c\u01a1 s\u1ed1 th\u1eadp ph\u00e2n, ngh\u0129a l\u00e0 ch\u1eef s\u1ed1 h\u00e0ng b\u00ean tr\u00e1i g\u1ea5p 10 l\u1ea7n ch\u1eef s\u1ed1 h\u00e0ng b\u00ean ph\u1ea3i.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 1 &#8211; Arkady Leokum B\u1ea1n c\u00f3 hai xu. N\u1ebfu cho b\u1ea1n th\u00eam hai xu n\u1eefa th\u00ec b\u1ea1n bi\u1ebft ngay m\u00ecnh c\u00f3 b\u1ed1n xu. Nh\u01b0ng b\u1ea1n c\u00f3 hi\u1ec3u r\u1eb1ng \u0111\u1ec3 \u0111i \u0111\u1ebfn ch\u1ed7 b\u1ea1n \u201cbi\u1ebft ngay\u201d m\u00ecnh c\u00f3 b\u1ed1n xu, nh\u00e2n lo\u1ea1i \u0111\u00e3 ph\u1ea3i [&hellip;]<\/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],"tags":[],"class_list":["post-13606","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13606","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=13606"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13606\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}