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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


Răspuns :

a) 5-2+3+11=17
b)5-[-(-1)+(-7)]-1=5-[1+(-7)]-1=5-6-1=-2
c)-36-72/(-2)^2=-36-72/4=-36-18=54