1) Efetue. Dica: Coloque na forma simplificada(sem os parênteses).
a) (−60) + (−40)+ (−12) =
b) (+80) + (−75)+ (−47) =
c) (+27) + (+13)+ (−28) =
d) (−11) + (+30) + (+35)+ (−27) =
e) (+35) + (−68) + (−22)+ (+48) =
f) (+12) + (−9)+ (+12)+ (−25) =
g) (+99) + (−100)+ (−100)+ (+98) + (−10) =
h) −80 + (−160) + (−190) + 60 =
2) Calcule o valor de:
a) 18 − 7− 24 + 21 =
b) 21 −3 − 23 =
c) −15 + 8 − 7 =
d) −12 + 4 + 11 −8 + 13 + 3 =
e) 2 −9 + 9 + 12 − 6 + 6 =
f) −14 + 42 −23 + 18 + 12 − 35 =
Soluções para a tarefa
Resposta:
1) Efetue. Dica: Coloque na forma simplificada(sem os parênteses).
a) (−60) + (−40)+ (−12) = -112
b) (+80) + (−75)+ (−47) = -42
c) (+27) + (+13)+ (−28) = 12
d) (−11) + (+30) + (+35)+ (−27) = 27
e) (+35) + (−68) + (−22)+ (+48) = -7
f) (+12) + (−9)+ (+12)+ (−25) = -10
g) (+99) + (−100)+ (−100)+ (+98) + (−10) = -13
h) −80 + (−160) + (−190) + 60 = -370
2) Calcule o valor de:
a) 18 − 7− 24 + 21 = 8
b) 21 −3 − 23 = -5
c) −15 + 8 − 7 = -14
d) −12 + 4 + 11 −8 + 13 + 3 = 11
e) 2 −9 + 9 + 12 − 6 + 6 = 14
f) −14 + 42 −23 + 18 + 12 − 35 = 0
Explicação passo a passo:
Resposta:
a) -(60)+(-40)+(-12)=-60-40-12=112
b) (+80)+(-75)+(-47)=80-75-47= -42
c) (+27)+(+13)+(-28)=27+13-28=12
d) (-11)+30)+(35)+(-27)= -11+30+35-27=27
e) (+35)+(-68)+(-22)+(+48)=35-68-22+48= -7
f) (+12)+(-9)+(+12)+(-25)=12-9+12-25= -10
g) (+99)+(-100)+(+98)+(-10)=99-100-100+98-10=-13
h) -80+(-160)+(-190)+60= 80-160-190+60= -210
2)a)18-7-24+21=11-24+21= -13+21=8
b) 21-3-23=18-23= -5
c) -15+8-7=7-7= -14
d) -12+4+11-8+13+3= -8+11-8+13+3=3-8+13+3= -5+13+3=8+3=11
e) 2-9+9+12-6+6=2+12-6+6=14
f)-14+42-23+18+12-35=56-23+18+12-35=+18+12-35=51+12-35=63-35=28
PRONTO,ESPERO TER AJUDADO☺