N\u1eafm ch\u1eafc c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n<\/strong><\/p>\n

Tr\u01b0\u1edbc h\u1ebft, \u0111\u1ec3 h\u1ecdc sinh c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c ph\u1ea7n x\u1eed l\u00ed s\u1ed1 li\u1ec7u trong c\u00e1c b\u00e0i th\u1ef1c h\u00e0nh nh\u1eadn x\u00e9t b\u1ea3ng s\u1ed1 li\u1ec7u v\u00e0 v\u1ebd bi\u1ec3u \u0111\u1ed3, gi\u00e1o vi\u00ean t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c th\u01b0\u1eddng d\u00f9ng \u0111\u1ec3 t\u00ednh to\u00e1n sau \u0111\u00f3 cho h\u1ecdc sinh th\u1ef1c h\u00e0nh (th\u1ef1c hi\u1ec7n \u1edf ph\u1ea7n nh\u1eadn x\u00e9t b\u1ea3ng s\u1ed1 li\u1ec7u v\u00e0 v\u1ebd bi\u1ec3u \u0111\u1ed3).<\/p>\n

C\u00e1c c\u00f4ng th\u1ee9c bao g\u1ed3m:<\/strong><\/p>\n

<\/a>
\nGi\u00e1o vi\u00ean l\u01b0u \u00fd h\u1ecdc sinh: T\u1ec9 su\u1ea5t gia t\u0103ng d\u00e2n s\u1ed1 t\u00ednh b\u1eb1ng ph\u1ea7n tr\u0103m (%) nh\u01b0ng t\u1ec9 su\u1ea5t sinh v\u00e0 t\u1ec9 su\u1ea5t t\u1eed t\u00ednh b\u1eb1ng ph\u1ea7n ngh\u00ecn n\u00ean ph\u1ea3i \u0111\u1ed5i t\u1eeb ph\u1ea7n nghin ra ph\u1ea7n tr\u0103m b\u1eb1ng c\u00e1ch chia k\u1ebft qu\u1ea3 (hi\u1ec7u t\u00ecm \u0111\u01b0\u1ee3c) cho 10.<\/span>C\u00e1c c\u00f4ng th\u1ee9c n\u00eau tr\u00ean \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n trong ph\u1ea7n nh\u1eadn x\u00e9t b\u1ea3ng s\u1ed1 li\u1ec7u v\u00e0 v\u1ebd bi\u1ec3u \u0111\u1ed3.<\/p>\n

\u0110\u1ed5i \u0111\u01a1n v\u1ecb: 1t\u1ea5n = 10 t\u1ea1 = 1.000kg. N\u1ebfu \u0111\u1ed5i t\u1ea5n ra t\u1ea1 th\u00ec sau khi chia, l\u1ea5y k\u1ebft qu\u1ea3 chia \u0111\u01b0\u1ee3c nh\u00e2n v\u1edbi 10, n\u1ebfu \u0111\u1ed5i t\u1ea5n ra kg th\u00ec nh\u00e2n v\u1edbi 1000.<\/p>\n

Ph\u00e2n t\u00edch v\u00e0 nh\u1eadn x\u00e9t b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea<\/strong><\/p>\n

Trong c\u00e1c b\u00e0i thi \u0110\u1ecba l\u00fd th\u01b0\u1eddng c\u00f3 c\u00e2u h\u1ecfi ph\u00e2n t\u00edch s\u1ed1 li\u1ec7u, b\u1edfi bi\u1ebft d\u1ef1a v\u00e0o b\u1ea3ng s\u1ed1 li\u1ec7u \u0111\u1ec3 t\u00ecm th\u00f4ng tin \u0111\u1ecba l\u00ed l\u00e0 m\u1ed9t trong nh\u1eefng k\u0129 n\u0103ng quan tr\u1ecdng trong h\u1ecdc t\u1eadp v\u00e0 nghi\u00ean c\u1ee9u \u0111\u1ecba l\u00ed.<\/p>\n

Lo\u1ea1i c\u00e2u h\u1ecfi y\u00eau c\u1ea7u ph\u00e2n t\u00edch s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea cho ph\u00e9p \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 am hi\u1ec3u, v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c c\u1ee7a ng\u01b0\u1eddi h\u1ecdc v\u00e0o c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3, \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c k\u0129 n\u0103ng ch\u1ecdn l\u1ecdc, x\u00e1c \u0111\u1ecbnh ki\u1ebfn th\u1ee9c \u0111\u1ecba l\u00ed.<\/p>\n

C\u00e1c b\u01b0\u1edbc ti\u1ebfn h\u00e0nh nh\u1eadn x\u00e9t nh\u01b0 sau: Nh\u1eadn x\u00e9t b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ef1c ch\u1ea5t l\u00e0 ph\u00e2n t\u00edch, so s\u00e1nh c\u00e1c s\u1ed1 li\u1ec7u theo h\u00e0ng ngang v\u00e0 c\u1ed9t d\u1ecdc, r\u00fat ra nh\u1eefng nh\u1eadn x\u00e9t c\u1ea7n thi\u1ebft.<\/p>\n

\u0110\u1ec3 h\u1ecdc sinh c\u00f3 th\u1ec3 nh\u1eadn x\u00e9t \u0111\u00fang v\u00e0 \u0111\u1ee7 \u00fd theo y\u00eau c\u1ea7u c\u1ee7a \u0111\u1ec1 b\u00e0i, gi\u00e1o vi\u00ean h\u01b0\u1edbng d\u1eabn h\u1ecdc sinh khi ph\u00e2n t\u00edch b\u1ea3ng s\u1ed1 li\u1ec7u, c\u00f4 Cao Th\u1ecb Thu cho r\u1eb1ng, c\u1ea7n th\u1ef1c hi\u1ec7n l\u1ea7n l\u01b0\u1ee3t theo c\u00e1c b\u01b0\u1edbc sau \u0111\u00e2y:<\/p>\n

X\u00e1c \u0111\u1ecbnh y\u00eau c\u1ea7u c\u1ee7a c\u00e2u h\u1ecfi trong \u0111\u1ec1 b\u00e0i , b\u00e0i t\u1eadp \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ee5c \u0111\u00edch l\u00e0m vi\u1ec7c v\u1edbi b\u1ea3ng s\u1ed1 li\u1ec7u.<\/p>\n

\u0110\u1ecdc t\u00ean b\u1ea3ng, c\u00e1c ti\u00eau \u0111\u1ec1 c\u1ee7a b\u1ea3ng, \u0111\u01a1n v\u1ecb t\u00ednh, x\u00e1c \u0111\u1ecbnh r\u00f5 c\u00e1c ti\u00eau ch\u00ed c\u1ea7n nh\u1eadn x\u00e9t.<\/p>\n

So s\u00e1nh c\u00e1c s\u1ed1 li\u1ec7u theo c\u1ed9t d\u1ecdc v\u00e0 h\u00e0ng ngang v\u1edbi m\u1ed9t tr\u00ecnh t\u1ef1 h\u1ee3p l\u00ed, c\u1ee5 th\u1ec3:<\/p>\n

Nh\u1eadn x\u00e9t s\u1ef1 thay \u0111\u1ed5i c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ecba l\u00ed theo th\u1eddi gian th\u00ec so s\u00e1nh s\u1ed1 li\u1ec7u c\u1ee7a c\u00e1c m\u1ed1c th\u1eddi gian \u0111\u1ea7u v\u00e0 cu\u1ed1i c\u1ee7a b\u1ea3ng, c\u00e1c m\u1ed1c th\u1eddi gian li\u1ec1n k\u1ec1 nhau theo th\u1ee9 t\u1ef1, c\u00e1c m\u1ed1c c\u00f3 t\u00ednh \u0111\u1ed9t bi\u1ebfn.<\/p>\n

\u0110\u1ed1i v\u1edbi c\u00e1c l\u00e3nh th\u1ed5, c\u1ea7n l\u01b0u \u00fd so s\u00e1nh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ecba l\u00ed c\u1ee7a c\u00e1c l\u00e3nh th\u1ed5 l\u1edbn v\u1edbi nhau, c\u00e1c l\u00e3nh th\u1ed5 nh\u1ecf v\u1edbi nhau v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n

Khi nh\u1eadn x\u00e9t c\u01a1 c\u1ea5u m\u00e0 s\u1ed1 li\u1ec7u trong b\u1ea3ng l\u00e0 c\u00e1c s\u1ed1 c\u00e1c s\u1ed1 li\u1ec7u tuy\u1ec7t \u0111\u1ed1i (v\u00ed d\u1ee5: Tri\u1ec7u t\u1ea5n, t\u1ec9kw\/h , tri\u1ec7u ng\u01b0\u1eddi, … m\u00e0 \u0111\u1ec1 l\u1ea1i y\u00eau c\u1ea7u nh\u1eadn x\u00e9t c\u01a1 c\u1ea5u th\u00ec ph\u1ea3i t\u00ednh c\u01a1 c\u1ea5u (t\u00ednh t\u1ec9 l\u1ec7 %).<\/p>\n

Khi tr\u00ecnh b\u00e0y nh\u1eadn x\u00e9t ph\u1ea3i theo tr\u00ecnh t\u1ef1 t\u1eeb kh\u00e1i qu\u00e1t \u0111\u1ebfn c\u1ee5 th\u1ec3, t\u1eeb chung \u0111\u1ebfn ri\u00eang, t\u1eeb cao xu\u1ed1ng th\u1ea5p, \u2026 b\u00e1m s\u00e1t y\u00eau c\u1ea7u c\u1ee7a c\u00e2u h\u1ecfi v\u00e0 k\u1ebft qu\u1ea3 x\u1eed l\u00ed s\u1ed1 li\u1ec7u. M\u1ed7i nh\u1eadn x\u00e9t c\u1ea7n c\u00f3 d\u1eabn ch\u1ee9ng c\u1ee5 th\u1ec3 \u0111\u1ec3 t\u0103ng t\u00ednh thuy\u1ebft ph\u1ee5c.<\/p>\n

Ph\u1ea7n gi\u1ea3i th\u00edch: \u0110\u1ec3 gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n c\u1ee7a c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u0111\u1ecba l\u00ed c\u00f3 trong b\u1ea3ng s\u1ed1 li\u1ec7u ph\u1ea3i d\u1ef1a v\u00e0o ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc.<\/p>\n

V\u00ec v\u1eady, h\u1ecdc sinh c\u1ea7n ph\u1ea3i n\u1eafm \u0111\u01b0\u1ee3c c\u00e1c m\u1ed1i quan h\u1ec7 nh\u00e2n qu\u1ea3 gi\u1eefa c\u00e1c s\u1ef1 v\u1eadt hi\u1ec7n t\u01b0\u1ee3ng \u0111\u1ecba l\u00ed; m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 t\u1ef1 nhi\u00ean v\u1edbi d\u00e2n s\u1ed1, gi\u1eefa t\u1ef1 nhi\u00ean v\u1edbi d\u00e2n c\u01b0 v\u00e0 kinh t\u1ebf x\u00e3 h\u1ed9i\u2026<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

C\u00f4 Cao Th\u1ecb Th\u01b0 – gi\u00e1o vi\u00ean Tr\u01b0\u1eddng THPT C\u1ea9m Th\u1ee7y 1 (Thanh H\u00f3a) chia s\u1ebb nh\u1eefng n\u1ed9i dung c\u01a1 b\u1ea3n c\u1ea7n l\u01b0u \u00fd trong \u00f4n t\u1eadp k\u0129 n\u0103ng th\u1ef1c… <\/p>\n","protected":false},"author":1,"featured_media":2605,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[75],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/2604"}],"collection":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/comments?post=2604"}],"version-history":[{"count":0,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/2604\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media\/2605"}],"wp:attachment":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media?parent=2604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/categories?post=2604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/tags?post=2604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}