{"id":1758731,"date":"2026-06-21T14:24:00","date_gmt":"2026-06-21T17:24:00","guid":{"rendered":"https:\/\/blog-estrategia.mystagingwebsite.com\/blog\/?p=1758731"},"modified":"2026-06-22T12:22:26","modified_gmt":"2026-06-22T15:22:26","slug":"numeros-decimais","status":"publish","type":"post","link":"https:\/\/www.estrategiaconcursos.com.br\/blog\/numeros-decimais\/","title":{"rendered":"N\u00fameros Decimais"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Aprenda os conceitos essenciais sobre n\u00fameros decimais com um resumo para as principais provas de concursos.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"598\" height=\"588\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2026\/04\/29141617\/captura-de-tela-2026-04-29-141552.png\" alt=\"Quadro com n\u00fameros - n\u00fameros decimais\" class=\"wp-image-1758737\" style=\"aspect-ratio:1.0170184009781746;width:462px;height:auto\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2026\/04\/29141617\/captura-de-tela-2026-04-29-141552.png 598w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2026\/04\/29141617\/captura-de-tela-2026-04-29-141552-300x295.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2026\/04\/29141617\/captura-de-tela-2026-04-29-141552-150x147.png 150w\" sizes=\"auto, (max-width: 598px) 100vw, 598px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ol\u00e1, pessoal! Tudo bem com voc\u00eas?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os <strong>n\u00fameros decimais<\/strong> est\u00e3o presentes em praticamente todas as situa\u00e7\u00f5es do cotidiano, desde valores monet\u00e1rios at\u00e9 medi\u00e7\u00f5es de grandezas. Em provas de concursos, esse tema costuma aparecer em quest\u00f5es que envolvem <strong>opera\u00e7\u00f5es b\u00e1sicas, interpreta\u00e7\u00e3o de problemas e aten\u00e7\u00e3o a detalhes num\u00e9ricos<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bancas como <strong><a href=\"https:\/\/www.vunesp.com.br\/?b=concurso\" target=\"_blank\" rel=\"noreferrer noopener\">Vunesp<\/a> e <a href=\"https:\/\/concursos.ibfc.org.br\/\" target=\"_blank\" rel=\"noreferrer noopener\">IBFC<\/a><\/strong> costumam explorar esse tema com frequ\u00eancia, principalmente em quest\u00f5es contextualizadas que exigem precis\u00e3o e leitura atenta. Apesar de parecer simples, muitos candidatos cometem erros por descuido na posi\u00e7\u00e3o da v\u00edrgula ou na organiza\u00e7\u00e3o dos c\u00e1lculos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Neste artigo, voc\u00ea vai revisar o conceito de n\u00fameros decimais, aprender a realizar opera\u00e7\u00f5es corretamente e entender como esse conte\u00fado \u00e9 cobrado em prova.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Confira os t\u00f3picos que ser\u00e3o abordados:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>N\u00fameros decimais;<\/li>\n\n\n\n<li>Opera\u00e7\u00f5es com n\u00fameros decimais;<\/li>\n\n\n\n<li>Exemplos resolvidos;<\/li>\n\n\n\n<li>Resumo.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-cyan-bluish-gray-background-color has-background\" id=\"h-numeros-decimais\">N\u00fameros Decimais<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os n\u00fameros decimais s\u00e3o n\u00fameros que possuem uma parte inteira e uma parte decimal, separadas por v\u00edrgula. Compreender o valor posicional ajuda a evitar erros em opera\u00e7\u00f5es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Por exemplo:<\/strong> 3,75.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Neste caso:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>3 \u00e9 a parte inteira<\/li>\n\n\n\n<li>75 representa a parte decimal<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Valor posicional<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cada casa decimal tem um valor espec\u00edfico:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d\u00e9cimos: 0,1<\/li>\n\n\n\n<li>cent\u00e9simos: 0,01<\/li>\n\n\n\n<li>mil\u00e9simos: 0,001<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Por exemplo:<\/strong> 2,47 = 2 + 0,4 + 0,07.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Transforma\u00e7\u00e3o em fra\u00e7\u00e3o<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Todo n\u00famero decimal pode ser escrito na forma de fra\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Por exemplo:<\/strong> 0,25 = 25\/100 = \u00bc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Essa convers\u00e3o \u00e9 \u00fatil em simplifica\u00e7\u00f5es e compara\u00e7\u00f5es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-cyan-bluish-gray-background-color has-background\" id=\"h-operacoes-com-numeros-decimais\">Opera\u00e7\u00f5es Com N\u00fameros Decimais<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Entraremos agora na parte mais cobrada sobre n\u00fameros decimais.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-adicao-e-subtracao\">Adi\u00e7\u00e3o e subtra\u00e7\u00e3o<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A adi\u00e7\u00e3o e a subtra\u00e7\u00e3o devem ser feitas <strong>alinhando<\/strong> as v\u00edrgulas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exemplo:<\/strong> 2,5 + 1,75.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp;2,5<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">+ 1,75<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">= <strong>4,25<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-multiplicacao\"><strong>Multiplica\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Multiplica-se normalmente ignorando as casas decimais e, ao final, ajusta-se a v\u00edrgula. O n\u00famero de casas decimais do resultado ser\u00e1 igual \u00e0 soma do n\u00famero de casas decimais de cada fator.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exemplo: <\/strong>2,5 x 1,2.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">25 \u00d7 12 = 300<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Como cada n\u00famero possui uma casa decimal, o resultado ter\u00e1 2 casas decimais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Resultado: 3,00 = <strong>3<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-divisao\"><strong>Divis\u00e3o<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Para realizar a divis\u00e3o, eliminamos a v\u00edrgula multiplicando dividendo e divisor por um m\u00faltiplo de 10 (10, 100, &#8230;).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exemplo: <\/strong>2,4 \u00f7 0,6.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Multiplicando ambos por 10:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2,4 \u00f7 0,6 = 24 \u00f7 6 = <strong>4<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-comparacao-de-decimais\"><strong>Compara\u00e7\u00e3o de decimais<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Para comparar n\u00fameros decimais diferentes, devemos igualar o n\u00famero de casas decimais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exemplo:<\/strong> 2,5 e 2,45.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">2,5 = 2,50<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Portanto,<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>2,50 &gt; 2,45<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-cyan-bluish-gray-background-color has-background\" id=\"h-exemplos-resolvidos-numeros-decimais\">Exemplos Resolvidos &#8211; N\u00fameros Decimais<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exemplo-1\"><strong>Exemplo 1<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Calcule: -2,56 + 1,3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resolu\u00e7\u00e3o:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aplicamos a regra de sinais normalmente, pois as regras de n\u00fameros inteiros continuam v\u00e1lidas para decimais. Portanto, efetuamos a diferen\u00e7a entre os dois n\u00fameros e utilizamos o sinal do maior, que nesse caso \u00e9 o negativo do 2,56.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;2,56<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp;&nbsp;&#8211; 1,30<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp;= 1,26<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Portanto, a resposta \u00e9 <strong>-1,26<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exemplo-2\"><strong>Exemplo 2<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Um produto custa R$ 12,75. Se uma pessoa comprou 3 unidades, quanto ela pagou?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resolu\u00e7\u00e3o:<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">12,75 \u00d7 3 = 38,25<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Resposta: <strong>R$ 38,25<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exemplo-3\"><strong>Exemplo 3<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Um carro percorre 12,5 km com 1 litro de combust\u00edvel. Quantos quil\u00f4metros ele percorre com 4 litros?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resolu\u00e7\u00e3o:<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">12,5 \u00d7 4 = 50<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Resposta: <strong>50 km<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exemplo-4\"><strong>Exemplo 4<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Calcule: (2,5 + 1,5) \u00d7 0,4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resolu\u00e7\u00e3o:<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">2,5 + 1,5 = 4,0 = 4<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">4 \u00d7 0,4 = <strong>1,6<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-cyan-bluish-gray-background-color has-background\" id=\"h-resumo-numeros-decimais\">Resumo \u2013 N\u00fameros Decimais<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Para te ajudar a revisar os principais pontos que vimos at\u00e9 aqui sobre n\u00fameros decimais, de forma r\u00e1pida e estrat\u00e9gica, preparamos um resumo:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Opera\u00e7\u00e3o<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Regra<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Adi\u00e7\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Alinhar v\u00edrgulas, completando com zeros se necess\u00e1rio<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Subtra\u00e7\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Alinhar v\u00edrgulas, completando com zeros se necess\u00e1rio<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Multiplica\u00e7\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Multiplicar sem v\u00edrgulas e ajustar v\u00edrgula<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Divis\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Eliminar v\u00edrgula multiplicando por m\u00faltiplo de 10<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Compara\u00e7\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Igualar casas decimais, completando com zeros se necess\u00e1rio<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-cyan-bluish-gray-background-color has-background\" id=\"h-finalizando-numeros-decimais\">Finalizando \u2013 N\u00fameros Decimais<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os n\u00fameros decimais fazem parte do dia a dia e tamb\u00e9m t\u00eam presen\u00e7a constante em provas de concursos. Embora o conte\u00fado seja b\u00e1sico, os erros mais comuns est\u00e3o ligados \u00e0 falta de aten\u00e7\u00e3o e \u00e0 execu\u00e7\u00e3o incorreta de procedimentos simples. Ter dom\u00ednio sobre decimais \u00e9 garantir pontos importantes em provas, especialmente em quest\u00f5es que parecem simples, mas exigem precis\u00e3o e cuidado nos detalhes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dominar o valor posicional, alinhar corretamente as opera\u00e7\u00f5es e aplicar estrat\u00e9gias como elimina\u00e7\u00e3o da v\u00edrgula s\u00e3o pontos essenciais para resolver quest\u00f5es com seguran\u00e7a. Com <strong>pr\u00e1tica<\/strong>, esses processos se tornam autom\u00e1ticos, reduzindo significativamente a chance de erro.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;\u00c9 importante refor\u00e7ar que este conte\u00fado <strong>deve ser utilizado como complemento ao material em PDF<\/strong>, onde a abordagem \u00e9 aprofundada e completa. Al\u00e9m disso, \u00e9 fundamental praticar com muitas quest\u00f5es, preferencialmente separadas por banca, para entender as diferentes formas de cobran\u00e7a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quer se aprofundar no tema? O Estrat\u00e9gia Concursos disponibiliza <strong>materiais em PDF completos e atualizados<\/strong>, com teoria detalhada, quest\u00f5es comentadas e videoaulas direcionadas para cada concurso. Com pr\u00e1tica e um bom material, voc\u00ea estar\u00e1 preparado para resolver qualquer quest\u00e3o de n\u00fameros decimais que aparecer na sua prova.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Acesse <a href=\"https:\/\/www.estrategiaconcursos.com.br\/blog\/\">os cursos do Estrat\u00e9gia Concursos<\/a> e fortale\u00e7a sua prepara\u00e7\u00e3o com um conte\u00fado de alto n\u00edvel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bons estudos e at\u00e9 a pr\u00f3xima!<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"cursos-assinatura\">Cursos e Assinaturas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Prepare-se com o melhor material e com quem mais aprova em Concursos P\u00fablicos em todo o pa\u00eds!<\/p>\n\n\n\n<p class=\"has-text-align-center has-vivid-cyan-blue-color has-text-color has-background wp-block-paragraph\" style=\"background-color:#0078bd\"><a href=\"https:\/\/www.estrategiaconcursos.com.br\/blog\/concursos-abertos\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-white-color\">Concursos Abertos<\/mark><\/strong><\/a><\/p>\n\n\n\n<p class=\"has-text-align-center has-vivid-cyan-blue-color has-text-color has-background wp-block-paragraph\" style=\"background-color:#0078bd\"><a href=\"https:\/\/www.estrategiaconcursos.com.br\/blog\/concursos-2026\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-white-color\">Concursos 2026<\/mark><\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aprenda os conceitos essenciais sobre n\u00fameros decimais com um resumo para as principais provas de concursos. Ol\u00e1, pessoal! Tudo bem com voc\u00eas? Os n\u00fameros decimais est\u00e3o presentes em praticamente todas as situa\u00e7\u00f5es do cotidiano, desde valores monet\u00e1rios at\u00e9 medi\u00e7\u00f5es de grandezas. Em provas de concursos, esse tema costuma aparecer em quest\u00f5es que envolvem opera\u00e7\u00f5es b\u00e1sicas, [&hellip;]<\/p>\n","protected":false},"author":3098,"featured_media":1485767,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"post_tipo":"article","footnotes":""},"categories":[2313,1,222407,3766,220184,220242,214992,220181,1983,220182,220183,222427,1988,222278,220191,222408,220737,1984,214710,222239,222235,222236,222237],"tags":[],"tax_estado":[219964,219965,219966,219967,219968,219969,219963,219970,219971,219972,219973,219974,219975,219976,219977,219978,219979,219980,219981,219982,219983,219984,219985,219986,219987,219988,219989,219990],"class_list":["post-1758731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-carreiras-bancarias","category-cursos-e-concursos","category-detran","category-educacional","category-engenharias-e-ti","category-estrategia-militares","category-concursos-administrativos","category-area-financeira","category-fiscal-estadual","category-fiscal-federal","category-fiscal-municipal","category-petrobras","category-policia","category-prefeituras","category-previdenciaria","category-tecnologia-da-informacao","category-tribunais-tribunais","category-tribunais","category-tribunais-de-contas","category-tribunais-regionais-federais","category-tribunal-de-justica","category-tribunal-regional-do-trabalho","category-tribunal-regional-eleitoral","tax_estado-ac","tax_estado-al","tax_estado-am","tax_estado-ap","tax_estado-ba","tax_estado-ce","tax_estado-concursos-federais","tax_estado-df","tax_estado-es","tax_estado-go","tax_estado-ma","tax_estado-mg","tax_estado-ms","tax_estado-mt","tax_estado-pa","tax_estado-pb","tax_estado-pe","tax_estado-pi","tax_estado-pr","tax_estado-rj","tax_estado-rn","tax_estado-ro","tax_estado-rr","tax_estado-rs","tax_estado-sc","tax_estado-se","tax_estado-sp","tax_estado-to"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - 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