Question

1) Calcule:
a) -128:(-1+3.3)(-7-1)

b)(-81:27)[45:(-15)-2 (-6)]

Answer 1

sendo:

-128 / (-1 + 3 * 3) * (-7 - 1 )

-128 /8 * -8 = 128

(-81/27) * (45 /(-15) - 2 * (-6)

(-3) * (-3) + 12 = 9 + 12 = 21