\u00cen fa\u021ba voastr\u0103 se afl\u0103 o ghicitoare matematic\u0103 aparent simpl\u0103, iar r\u0103spunsul poate p\u0103rea evident. Privi\u021bi cu aten\u021bie expresia din imagine: 36 \u2212 36 \u00f7 (6 \u00d7 6) = ?
\n\u2800
\nLa prima vedere, a\u021bi putea crede c\u0103 r\u0103spunsul este 0. La urma urmei, vedem 36 minus \u00eenc\u0103 un 36. Ochii parc\u0103 ne sugereaz\u0103 automat: 36 \u2212 36 = 0.
\n\u2800
\nDar exist\u0103 un mic detaliu care schimb\u0103 totul. Expresia nu ne cere pur \u0219i simplu s\u0103 sc\u0103dem un 36 din altul. Avem mai multe opera\u021bii matematice, iar acestea trebuie efectuate \u00een ordinea corect\u0103. Tocmai aici se ascunde partea interesant\u0103 a exerci\u021biului.
\n\u2800
\nMai \u00eent\u00e2i, s\u0103 analiz\u0103m ce se afl\u0103 \u00eentre paranteze: 6 \u00d7 6. Rezultatul este 36. Prin urmare, expresia ini\u021bial\u0103 poate fi rescris\u0103 astfel: 36 \u2212 36 \u00f7 36.
\n\u2800
\nAcum ne-au r\u0103mas sc\u0103derea \u0219i \u00eemp\u0103r\u021birea. Care dintre ele trebuie efectuat\u0103 prima? Conform ordinii standard a opera\u021biilor matematice, \u00eenmul\u021birea \u0219i \u00eemp\u0103r\u021birea se efectueaz\u0103 \u00eenaintea adun\u0103rii \u0219i sc\u0103derii.
\n\u2800
\nA\u0219adar, trebuie mai \u00eent\u00e2i s\u0103 \u00eemp\u0103r\u021bim \u0219i abia apoi s\u0103 sc\u0103dem. Calcul\u0103m: 36 \u00f7 36 = 1. Acum expresia devine 36 \u2212 1. Iar \u00een final: 36 \u2212 1 = 35. Prin urmare, r\u0103spunsul corect este 35.
\n\u2800
\nIat\u0103 de ce r\u0103spunsul nu este 0: ob\u021binem zero doar dac\u0103 ne gr\u0103bim \u0219i efectu\u0103m sc\u0103derea \u00eenainte de momentul potrivit. De exemplu, cineva care vede expresia ar putea g\u00e2ndi imediat: \u201e36 minus 36 este 0\u201d, modific\u00e2nd astfel, f\u0103r\u0103 s\u0103-\u0219i dea seama, ordinea opera\u021biilor.
\n\u2800
\nDar nu putem alege ordinea calculelor doar pentru c\u0103 o anumit\u0103 variant\u0103 pare mai simpl\u0103. Mai \u00eent\u00e2i trebuie s\u0103 efectu\u0103m opera\u021bia din paranteze, apoi \u00eemp\u0103r\u021birea \u0219i abia la final sc\u0103derea.
\n\u2800
\nExist\u0103 \u0219i o alt\u0103 modalitate de a \u00een\u021belege acela\u0219i lucru. Expresia poate fi scris\u0103 astfel: 36 \u2212 (36 \u00f7 36). Parantezele din jurul \u00eemp\u0103r\u021birii ne ajut\u0103 s\u0103 observ\u0103m mai clar structura calculului.
\n\u2800
\nAcum totul devine evident: a doua parte a expresiei nu reprezint\u0103 pur \u0219i simplu num\u0103rul 36. Este vorba despre 36 \u00eemp\u0103r\u021bit la 36, ceea ce \u00eenseamn\u0103 1. A\u0219adar, \u00een realitate calcul\u0103m 36 \u2212 1, nu 36 \u2212 36. Aceast\u0103 mic\u0103 diferen\u021b\u0103 schimb\u0103 complet rezultatul.
\n\u2800
\nAcest exemplu demonstreaz\u0103 c\u00e2t de important este s\u0103 citim cu aten\u021bie expresiile matematice \u0219i s\u0103 nu calcul\u0103m doar dup\u0103 prima impresie. Uneori, r\u0103spunsul care pare cel mai evident la \u00eenceput se dovede\u0219te a fi gre\u0219it.
\n\u2800
\nDac\u0103 \u0219i voi a\u021bi crezut imediat c\u0103 r\u0103spunsul este 0, nu v\u0103 face\u021bi griji. Tocmai aceasta este capcana preg\u0103tit\u0103 \u00een acest exerci\u021biu.
\n\u2800
\nTrebuie doar s\u0103 re\u021bine\u021bi ordinea opera\u021biilor: mai \u00eent\u00e2i parantezele, apoi \u00eenmul\u021birea \u0219i \u00eemp\u0103r\u021birea, iar la final adunarea \u0219i sc\u0103derea.
\n\u2800
\nAcum putem rezolva exerci\u021biul cu \u00eencredere:
\n\u2800
\n6 \u00d7 6 = 36
\n\u2800
\n36 \u00f7 36 = 1
\n\u2800
\n36 \u2212 1 = 35
\n\u2800
\nA\u0219adar, r\u0103spunsul final este 35.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u00cen fa\u021ba voastr\u0103 se afl\u0103 o ghicitoare matematic\u0103 aparent simpl\u0103, iar r\u0103spunsul poate p\u0103rea evident. Privi\u021bi cu aten\u021bie expresia din imagine: 36 \u2212 36 \u00f7 (6 \u00d7 6) = ? \u2800 La prima vedere, a\u021bi putea crede c\u0103 r\u0103spunsul este 0. La urma urmei, vedem 36 minus \u00eenc\u0103 un 36. Ochii parc\u0103 ne sugereaz\u0103 automat: […]<\/p>\n","protected":false},"author":1,"featured_media":29249,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29722","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diverse"],"_links":{"self":[{"href":"https:\/\/bumzi.ro\/index.php?rest_route=\/wp\/v2\/posts\/29722","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bumzi.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bumzi.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bumzi.ro\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bumzi.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=29722"}],"version-history":[{"count":1,"href":"https:\/\/bumzi.ro\/index.php?rest_route=\/wp\/v2\/posts\/29722\/revisions"}],"predecessor-version":[{"id":29723,"href":"https:\/\/bumzi.ro\/index.php?rest_route=\/wp\/v2\/posts\/29722\/revisions\/29723"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bumzi.ro\/index.php?rest_route=\/wp\/v2\/media\/29249"}],"wp:attachment":[{"href":"https:\/\/bumzi.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bumzi.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bumzi.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}