Question

2. Calculați:
a) (-7) + (+3) + (-1);
b) 1-51 – 1+2+ |-3-|-11;
c) 11-[-1 +3-(-3 + 15) - 7];
d)-15 + {-1 + [7 -(+14 - 3)] – 7}.​

Answer 1

Răspuns:

a) -7 +3 -2= -6

b) 1-51-1+2 +|-3|-11 =-50+1+3-11 = -49+4-11 = -45-11=-56

c)11-(2-12-7) = 11-(-17)= 11+17= 28

d) -15+(-1+7-11)-7 = -15+(-5)-7 =-15-5-7 =-27

Answer 2

a) (-7) + (+3) + (-1)=(-7)+3-1=(-7)+2=-7+2=-5

b) 1-51 – 1+2+ |-3|-11=-50+1+3-11=-49-8=-57

c) 11-[-1 +3-(-3 + 15) - 7]

=11-[+2-(+12)-7]=11-(+2-12-7)=11-(-10-7)=11-(-17)=11+17=28

d)-15 + {-1 + [7 -(+14 - 3)] – 7}=-15+{-1+[7-(+11)]-7}

=-15+[-1+(7-11)-7]=-15+[-1+(-4)-7]=-15+(-1-4-7)

=-15+(-12)=-15-12=-27

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