Question

calculati,desfacand mai intai parantezele:
a)+5+9(-9)-(+4)+(-13)-(-7)+(-8);
b)-8+(+4)-(-2)+(-15)-(+10)+(-11);
c)-14+(-18)-(+3)+(+12)-(-9)+(-17);
d)10+(-11)-(+7)+(-3)-(-12)+(-4);
e)+7+(-8)-(+5)+(-12)-(9)+(-6);
f)-9+(+5)-(-3)+(-16)-(+11)+(-10);
g)-`15+(-18)-(+4)+(+11)-7(-7)+(-19);
h)12+(-13)-(+8)+(-4)-(-15)+(-6);
i)14+(-2+3-5)-(-7+4-6);
j)-23-(10-9+3)+(12-19+3);
k)21+(-13+7-9)-(-11+9-2);
l)-17+(-9+18-13)-(15-10+7);
m)27-(3+20-9)+(-18+5-2);
n)-18+(-13+4-7)-(-9+15+3);
o)16+(-3+4-6)-(-8+5-7);
p)-24-(11-10+4)+(13-21+4);
q)22+(-14+8-9)-(-12+11-3);
r)-18+(-10+19-14)-(16-11+8);
s)28-(4+21-10)+(-19+6-3);
S)-19+(-14+5-8)-(-9+15+3);
t)-23-(16-8+12)+(-13+16+9);
T)18-34+(-4)-(-10)-(+11)-(-4);
u)21-(7-11+10-12)+(-5+7-9);
v)3+(12-19+8-15)-(-11+8+12).

Answer 1

a) +5+9(-9)-(+4)+(-13)-(-7)+(-8)=
= 5-81-4-13+7-8
= -94

b) -8+(+4)-(-2)+(-15)-(+10)+(-11)=
= -8+4+2-15-10-11
= -38

c) -14+(-18)-(+3)+(+12)-(-9)+(-17)=
= -14-18-3+12+9-17
= -31

d) 10+(-11)-(+7)+(-3)-(-12)+(-4)=
= 10-11-7-3+12-4
= -3

e) +7+(-8)-(+5)+(-12)-(9)+(-6)=
= 7-8+5-12-9-6
= -23

f) -9+(+5)-(-3)+(-16)-(+11)+(-10)=
= -9+5+3-16-11-10
= -38

g) -15+(-18)-(+4)+(+11)-7(-7)+(-19)=
= -15-18-4+11+49-19
= 4

h) 12+(-13)-(+8)+(-4)-(-15)+(-6)=
= 12-13-8-4+15-6
= -4

i) 14+(-2+3-5)-(-7+4-6)=
= 14+(-4)-(-9)
= 14-4+9
= 19

j) -23-(10-9+3)+(12-19+3)=
= -23-4+(-4)
= -23-4-4
= -31

k) 21+(-13+7-9)-(-11+9-2)=
= 21+(-15)-(-4)
= 21-15+4
= 10

l) -17+(-9+18-13)-(15-10+7)=
= -17+(-4)-12
= -17-4-12
= -33

m) 27-(3+20-9)+(-18+5-2)=
= 27-14+(-15)
= 27+14-15
= -2