Question

vreau si eu o mana de ajutor, multumesc!

Answer 1

a)
-17-(4+11)=
=-17-15=
=-32
b)
-4-(-3+2)=
=-4+1=
=-3

Answer 2

$1)a)a = - 17$

$b = 4$

$c = - 11$

$a - (b - c) = - 17 - [4 - ( - 11)]$

$= - 17 - (4 + 11)$

$= - 17 - 15$

$= - 32$

$b)a = - 4$

$b = - 3$

$c = - 2$

$a - (b - c) = - 4 - [ - 3 - ( - 2)]$

$= - 4 - ( - 3 + 2)$

$= - 4 - ( - 1)$

$= - 4 + 1$

$= - 3$