Question

Calculati:
1) a) (+2)-(-5)-(+7)-(-6)-(+8)-(-1) =
b) (-7)-(-3) -(+4)-(-5)-(+1)-(-8)=
c)(-8) -(+2)-(-5)-(-9)-(+4)-(-7)=
d) (+5)-(-9)-(-2)-(+3)-(-8)-(-1) =
e) (-6)-(-3)-(-8)-(+5)-(-7)-(-1)
f) (+8)-(-5)-(-4)-(-2)-(-3)-(+ 7) =
.​

Answer 1

Răspuns:

a) -1

b) 4

c) 7

d) 22

e) 8

f) 15

Explicație pas cu pas:

a) 2 + 5 - 7 + 6 - 8 +1 = 7-7+6-8+1=0+6-8+1=6-8+1=-2+1=1

b) -7+3-4+5-1+8=-4-4+5-1+8=-8+5-1+8=-3-1+8=-4+8=4

c) -8-2+5+9-4+7=-10+5+9-4+7=-5+9-4+7=4-4+7=0+7=7

d) 5+9+2-3+8+1=14+2-3+8+1=16-3+8+1=13+8+1=21+1=22

e) -6+3+8-5+7+1=-3+8-5+7+1=5-5+7+1=0+7+1=7+1=8

f)8+5+4+2+3-7=13+4+2+3-7=17+2+3-7=19+3-7=22-7=15