a)42+360÷4=42+90=132
b)9×15-3=135-3=132
c)45÷(1+3+5)+16×2=45÷9+32=5+32
=37
d)(10+2×3+7)×10=(10+6+7)×10=23×10
=230
e)2×(437-105÷7)=2×(437-15)=2×422
=844
f)84-(100-6×9)+(5×8-12÷3)
=84-(100-54)+(40-4)
=84-36+36=48+36=84
g)12÷[6+(28-68÷4)-5]
=12÷[6+(28-17)-5]
=12÷(6+11-5)
=12÷12=1
h)1354+2000-[11+(9×40-6×11)÷7]×20
=1354+2000-[11+(360-66)÷7]×20
=1354+2000-(11+294÷7)×20
=1354+2000-(11+42)×20
=1354+2000-53×20
=1354+2000-1060
=3354-1060=2294
i)2+2×[2+2×(2+2×2)×2]
=2+2×[2+2×(2+4)×2]
=2+2×(2+2×6×2)
=2+2×(2+12×2)
=2+2×(2+24)
=2+2×26
=2+52
=54
Sper că te-am ajutat! =^_^=
