Question

5. Efectuați:
3);
3);
a) – 3 +(-5)-(-8) + (+ 3) - (+ 7);
b) 8-(-6+2)+(-4-5)-(-3+9);
c)-(-3)+(-7-3) - (7 – 15) + (−8+2 – 5);
d) 13 -(-8-3) + (9-15) - (-3-8 + 15);
e) - (-6+ 2) + (5 - 16)-(-4-3 – 8);
f) 4-(-8-3)+(-6+8)+(- 10+ 3 – 5);
g)-(-12 + 17)+(-9-3)-(7 - 15) + (8 - 15 – 3);
b) - 16-(-8+3)+(- 12 - 3) +(-7)-(-2-13);
1) 7+(-2-8)-(9- 15) + (-4+ 2)-(-9+11);
j)-(-6-3) +(+ 12-8-5)-(-8 +17) + (+ 3 - 15);
k) 18 +(-2+8)-(-10-5)+(-4+3)-(-5-2+7);
1) – 20 – (3 - 15 – 2) + (-9+5+6)-(-8-5 – 7);
m) 4+(-6 – 3)-[-8+(-2+5)];
n) - 3 -(8 - 15) + (-8 - 3) - [7 - (- 13 - 9)];
0) 6-1-5-(-2+7)] + [-2 + (5 – 19)];
p)-(-12 + 8) + (-7+2 +(8 - 15 + 3)-(-9+8 - 3)];
q) 14+(-5+3)+{-8+(-3-(-9-8) + 5]};
1)-12-(-3+(- 16+3)] - {-4-[+ 7-(-9-7+17)]};
s) +(-8+13) + {-9-[+8-(-9+3)]}-(-8+(-7-3)];
t) - 16+ {-10-(-4+(-3+ 5)] - 3} - {4-[-6+ (2 - 5) - 7] +3} - 9.
129-​

Answer 1

Răspuns:

$a) - 3 - 5 + 8 + 3 - 7 = - 4$

$b)8 + 4 - 9 - 6 = - 3$

$c)3 - 10 + 8 - 11 = - 10 \\ d)13 + 11 - 6 - 4 = 14 \\ e)4 - 11 + 15 = 8 \\ f)4 + 11 + 2 - 12 = 5 \\ g) - 5 - 12 + 8 - 10 = - 19 \\ h) - 16 + 5 - 15 - 7 + 15 = - 18 \\ i)7 - 10 + 6 - 2 - 2 = 7 \\ j) + 9 - 1 - 9 - 12 = - 13 \\ k)18 + 6 + 15 - 1 - 0 = 38$

$l)-20+14+2+20=16 \\ </p><p>m)4-9-(-8+3)=-5+5=0 </p><p>n)-3+7-11-(7+22)=-7-29=-36 </p><p>o)6-6-5+(-2-14)=-5-16=-21 </p><p>p)4+(-5-4+4)=-1 </p><p>q)14-2+[-8+(-3+17)+5]=12+(-2+14)=12+12=24 </p><p>r)-12-(-3-13)-[-4-(7-1)]=-12+16-(-4-6)=4+10=14 </p><p>s)5+[-9-(8+6)]-(-8-10)=5+(-9-14)+18=23-23=0$