Question

Calculati:
a.l-5l-l+2l+l-7+4l- (-11)
b.(-5+10)-[-(-3+2)+(-7)]-(-14+15)
c.-36-72:(-4+2)la puterea 2

Answer 1

$a)~|-5|-|+2|+|-7+4|-(-11)= \\ =5-2+|-3|+11= \\ =5-2+3+11= \\ =17. \\ \\ b)~(-5+1)-[-(-3+2)+(-7)]-(-14+15)= \\ =-4-[-(-1)-7]-1= \\ =-4-(1-7)-1= \\ =-4-(-6)-1= \\ =-4+6-1= \\ =1.$

$c)~-36-72:(-4+2)^2= \\ =-36-72:(-2)^2= \\ =-36-72:4= \\ =-36-18= \\ =-54.$