Question

efetue as operações a
a= -90+(-20)+90+20
b=777+(-777)-(+777)+77
c=50×[88×(-2)]
d=(-50)×(-88)×2×250×(-4)

Answer 1

a= -90+(-20)+90+20 =
     -90 -20 +90 +20 =
     -110 + 110 =
     0
 
b= 777+(-777)-(+777)+77 =
     777 - 777 - 777 +77 =
     854 - 1554 =
     - 700

c=50×[88×(-2)] =
    50x[-176 ] =
    -8800

d=(-50)×(-88)×2×250×(-4) =
     +4400 x 500 x (-4) =
     +2.200.000 x (-4) =
     - 8.800.000