Question

calcule
a)(-100)÷(-5)
b)(+42)÷(-7)
c)(-72)÷(+9)
d)(+15)÷(+1)​

Answer 1

Hello human...

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Resultados

$\color{red}\textbf{\Large 20}$

$\color{red} \textbf{\Large - 6}$

$\color{red}\textbf{\Large - 8}$

$\color{red}\textbf{\Large 15}$

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Regra dos Sinais

Sinais — com — o resultado será +

Sinais + com + o resultado será +

Sinais — com + o resultado será —

Sinais + com — o resultado será —

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• $\color{gold}\textbf{\large (-100)÷(-5)} \\ \color{gold}\textbf{\large 100 ÷ 5} \\ \color{gold}\textbf{\large 20}$

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• $\color{gold}\textbf{\large (+42) ÷ (-7)} \\ \color{Gold}\textbf{\large 42 ÷ 7} \\ \color{Gold}\textbf{\large -6}$

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• $\color{gold}\textbf{\large ( - 72) ÷ ( + 9)} \\ \color{gold}\textbf{\large - 72 ÷ 9} \\ \color{gold}\textbf{\large 8}$

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• $\color{gold}\textbf{\large ( + 15) ÷ ( + 1)} \\ \color{gold}\textbf{\large 15 ÷ 1} \\ \color{gold}\textbf{\large 15}$