Question

17. Calculați desfiintand parantezele. a) 14+1-7+[+4-11+(-5-4)-(-6+8-3)] +7}; b) [(3–2+1)-(-5-4+7)-(+4)]-[7+(-3-2-4)-(4+3+1)+(-61; C) -5 – |--1 +[-3 +(-5 – 2)]-[4-(-7 – 4) + (-3 + 7)) - 2); d) 4+ [1-[2-(-5-1)+(-3+2)]-[-2+(2-5)-(-3+5)1-45.​

Answer 1

Răspuns:

a) 14+\ -7+[+4-11+(-5-4)-(-6+8-3)]+7\ =14+\ -7+ [ 7-9-(- (-9+8)+7\ =

14+[-7+(-16+1)+7]=14+(-7-15+7)=14-15=-1

b) [(3-2+1)-(-5-4+7)-(+4)]-[7+(-3-2+ 4)-(-4+3+1)+(-6))=[(2+2-4)]-(7-1-0-6)==0 - O = O

c) -5 - \ -1+[-3+(-5-2)]-[-4-(- -7-4)+(-3+7))- 2)=-5-[-1+(-3-7)]-(-4+11+4-2)=

=-5-11-9=-25

d) 4+\ 1-[2-(-5-1)+(-3+2)]-[-2+(2-5)-(-3+5 +5)2- ) =4+[1-(2+6-1)]-(-2-3-2+2-4)=

=4+(1-7)-(-5-4)=4-6+9=7