Question

Efectuați calculele respectând ordinea efectuării operațiilor
a)-5·(-6)+(-20)
b)+99-(-5)·(-19)
c)-10·(+12)+(-7)·(-15)​

Answer 1

a)

-5×(-6)+(-20)=

30-20=

$\color{blue}\boxed{{10}}$

b)

+99-(-5)×(-19)=

+99-95=

$\color{green}\boxed{{4}}$

c)

-10×(+12)+(-7)×(-15)=

-120+105

$\color{purple}\boxed{{-15}}$