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1)36+(74)+208=318.
2)-4+(-9)+(-5)+(+10)+(-9)=-4-9-5+10+9=-17.
3) 3 +(-5) +(+4)+(-1) +6=3-5+4-1+6=7.
4) +5+ +2+ -5 + -7+ -4+ -6=5+2-5-7-4-6=-15.
5) -36 + -112 + 144 +50=-36-112+144+50=46.
6) -240+-1260+ +1550=-240-1260+1550=50.
7) (8 - 4 + 7 - 2 ) + (-13 + 5 -7 ) - (-4 -3 + 8)=9-15-1=-7.
8) [(-4 + 12) + (7-3)] - [(9+6-5) - (8 - 12)]=(8+4)-(20-(-4))=12-24=-12.
9) 30- (18-19+21) - (23 - 20 - 2) -[12-(8-5)]=30-20-1-9=0.
10) {87 - [(49 - 26) - 33]} - 85 + (12 - 7 + 8)=87-(23-33)-85+13=87+10-85+13=25.
11) 57- (41 - 36 ) - {53 - [ 26 + (13 - 45 ] + 12 } =
=57-5-[53-6]=52-33=19.
Un saludo.
1) 36 +74 + 208=318 R//
2) -4-9-5+10-9=-17 R//
3) 3-5+4-1+6=7 R//
4) 5+12-5-7-4-6 =-5 R//
5) -36-112+144+50=46 R//
6) -240-1260+1550=50 R//
resolver las operaciones combinadas:
7) (8-4+7-2)+(-13+5-7)-(-4-3+8)
9+(-15)-(-4-3+8)=9-15+4+3-8= -7 R//
8) [(-4+12)+(7-3)]-[(9+6-5)-(8-12)]
[8+4]-[10-8+12]= 12-10+8-12=-2 R//
9) 30-18+19-21-23+20+2-[12-8+5]=9-12+8-5= 0 R//
10) {87-[(49-26)-33]}-85+(12-7+9)
{87-[23-33]}-85+12-7+9
{87-23+33}-71
87-23+33-71= 26 R//
11) 57-(41-36)-{53-[26+(13-45)]+12
57-41+36-{53-[26-32+12}
52{53-26+32-12}
52-47= 5 R//