Expressões numéricas
Devemos obedecer algumas regras para calcular expressões numéricas.
Primeiro parenteses, depois colchetes e por último as chaves.
Também primeiramente devemos efetuar as divisões e ou multiplicações, obedecendo a regra de sinais.
a) ( √81 • 3) + (√64 - √49)=
[tex](\sqrt{81} .3)~+~(\sqrt{64} -\sqrt{49})=\\\\\\(9.3)+(8-7)=\\\\\\27+1=\\\\\\Resposta=+28[/tex]
[tex]b)(\sqrt{25} .\sqrt{100} :5).3+7=\\\\\\(5.10:5).3+7=\\\\\\(50:5).3+7=\\\\\\10.3+7=\\\\\\30+7=\\\\\\Resposta=+37\\[/tex]
c) 2+√100 : 5•3 + 7=
[tex]2+\sqrt{100} :5.3+7=\\\\\\2+10:5.3+7=\\\\\\2+5.3+7=\\\\\\2+15+7=\\\\\\Resposta=+24[/tex]
d) 4+3+3 •√25 -5•√9=
[tex]4+3+3.\sqrt{25} -5.\sqrt{9} =\\\\\\4+3+3.5-5.3=\\\\\\+7+15-15=\\\\\\Resposta=+7[/tex]
e) (30 :√100) • (√4 • √9 + √81)=
[tex](30:\sqrt{100} ).(\sqrt{4} .\sqrt{9} +\sqrt{81} )=\\\\\\(30:10).(2.3+9)=\\\\\\3.(15)=\\\\\\Resposta=+45[/tex]
f) 2• (√1 • 5 - √16) + 5=
[tex]2.(\sqrt{1} .5-\sqrt{16} )+5=\\\\\\2.(5-4)+5=\\\\\\2.(1)+5=\\\\\\2+5=\\\\\\Resposta =+7[/tex]
Para saber mais acesse o link abaixo
Expressões numéricas
https://brainly.com.br/tarefa/46854403
