Aprendendo Excel – Inicio

O Microsoft Excel inclui quatro tipos diferentes de operadores de cálculo: aritméticos, de comparação, de texto e de referência.

Operadores aritméticos 

Para efetuar operações matemáticas básicas, como adição, subtração ou multiplicação.

Operador
Significado e (exemplo.)
+ (sinal de mais) Adição (1+1)
(sinal de menos) Subtração (2–1)
Negação (–1)
* (asterisco) Multiplicação (1*1)
/ (sinal de divisão) Divisão (1/1)
% (sinal de porcentagem) Porcentagem (10%)
^ (acento circunflexo) Exponenciação (10^2)

Operadores de comparação     

Ao comparar dois valores usando esses operadores, o resultado é um valor lógico, VERDADEIRO ou FALSO.

Operador de comparação Significado (exemplo)
= (sinal de igual) Igual a (A1=B1)
> (sinal de maior que) Maior que (A1>B1)
< (sinal de menor que) Menor que (A1<B1)
>= (sinal de maior ou igual a) Maior ou igual a (A1>=B1)
<= (sinal de menor ou igual a) Menor ou igual a (A1<=B1)
<> (sinal de diferente de) Diferente de (A1<>B1)

Operador de concatenação de texto

Use o ‘E’ comercial (&) para associar, ou concatenar, uma ou mais sequências de caracteres de texto.

Operador de texto Significado (exemplo)
& (E comercial) Conecta, ou concatena, dois valores para produzir um valor de texto contínuo (“mal”&”sucedido”)

Operadores de referência     

Combine intervalos de células para cálculos com estes operadores.

Operador de referência Significado (exemplo)
: (dois-pontos) Operador de intervalo, que produz uma referência para todas as células entre duas referências, incluindo as duas referências (B5:B15)
, (vírgula) Operador de união, que combina diversas referências em uma referência (SOMA(B5:B15,D5:D15))
 (espaço) Operador de interseção, que produz sobre referência a células comuns a duas referências (B7:D7 C6:C8)

As fórmulas calculam valores segundo uma ordem específica. Uma fórmula no Excel sempre começa com um sinal de igual (=). O sinal de igual informa ao Excel que os caracteres a seguir constituem uma fórmula.
O Excel calcula a fórmula da esquerda para a direita, de acordo com uma ordem específica para cada operador da fórmula.

Ao utilizar vários operadores o Excel vai seguir a ordem especifica mostrada abaixo.
OBS: lembrando que é possível alterar esta ordem veja mais abaixo como fazer.

Operador Descrição
: (dois-pontos)(espaço simples), (vírgula) Operadores de referência
Negação (como em –1)
% Porcentagem
^ Exponenciação
* e / Multiplicação e divisão
+ e – Adição e subtração
& Conecta duas sequências de texto (concatenação)
=
< >
<=
>=
<>
Comparação

Alterando a ordem de operação do Excel

Para alterar a ordem da avaliação, use parênteses na parte da fórmula a ser calculada primeiro.  a fórmula a seguir retornará 20 porque o Excel calcula a multiplicação antes da adição. A fórmula multiplica 2 por 5 e, em seguida, soma 10 ao resultado.

=10+2*5

Por outro lado, se você usar parênteses irá alterar a ordem, o Excel irá somar 10 e 2 e, em seguida, multiplicará o resultado por 5 e o total será 60.

=(10+2)*5

note que no primeiro exemplo o resultado é 20 e no segundo é 60 o que alteraria qualquer trabalho que esteja sendo executado no Excel com uma diferença de valores muito grande.

abaixo, os parênteses no inicio da fórmula forçam o Excel a calcular B1+100 primeiro e, em seguida, dividir o resultado pela soma dos valores nas células D1, E1 e F1.

=(B1+100)/SOMA(D1:F1)

espero ter ajudado e em breve novas atualizações aqui.

grt
DavidGois

 lista e matérias e exemplos publicados aqui no blog:

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