-5+12-=
-17-6-=
(-3)x(-9)-
(-72):8-=​

Răspuns:

[tex]\color{blue}~~\Large \bf a)~~ \boxed{\bf 7}[/tex]

[tex]\color{orange}~~\Large \bf b)~~ \boxed{\bf -23}[/tex]

[tex]\color{green}~~\Large \bf c)~~ \boxed{\bf 27}[/tex]

[tex]\color{red}~~\Large \bf d)~~ \boxed{\bf -9}[/tex]

Explicație pas cu pas:

[tex]\large \bf a)~~ -5 +12 = \boxed{\bf 7}[/tex]

[tex]\large \bf b)~~ -17 -6 = \boxed{\bf -23}[/tex]

[tex]\large \bf c)~~( -3)\cdot( -9) =3\cdot 9 = \boxed{\bf 27}[/tex]

[tex]\large \bf d)~~( -72):8= -72:8 = \boxed{\bf -9}[/tex]

==pav38==