Question

Am nevoie de calculat 1 supra 20:(-1 supra 10-)-(-3supra5) va rog frumos

Answer 1

Salutare!

$\bf \dfrac{1}{20}:\Big(-\dfrac{1}{10}\Big )-\Big(-\dfrac{3}{5}\Big)=$

$\bf -\dfrac{1}{20}\cdot \dfrac{10}{1}-\Big(-\dfrac{3}{5}\Big)=$

$\bf -\dfrac{1}{\not20}\cdot \dfrac{\not10}{1}+\dfrac{3}{5}=$

$\bf -\dfrac{1}{2}\cdot \dfrac{1}{1}+\dfrac{3}{5}=$

$\bf -\dfrac{1}{2}+\dfrac{3}{5}=$

$\bf -\!{^{^{^{^{^{^{\displaystyle 5)}}}}}}}\!\!\!\ \dfrac{1}{2}+\!{^{^{^{^{^{^{\displaystyle 2)}}}}}}}\!\!\!\ \dfrac{3}{5}=$

$\bf - \dfrac{5}{10}+ \dfrac{6}{10}=$

$\bf \dfrac{-5+6}{10}=$

$\boxed {\bf \dfrac{1}{10}}$

Regula de semnelor:

(+) · (+) = (+)

(+) · (-) = (-)

(-) · (-) = (+)

(-) · (+) = (-)

==pav38==