Question

ajudaaaaa prfvr, urgente​

Answer 1

a) 15 + ( -3 )+ 4 - ( -5 ) -( +6 )

15 - 3 + 4 + 5 - 6

24 - 9 = 15

b) - 12 + 7 + ( -8+3 ) - ( 9-12 )

-5+(-5)-(-3)

-10+3 = -7

c) ( -1 ) . ( -1 ) . ( -1 ) . ( -1 ) = 1

d) - 15 + 10 : ( 2-7 )

-5:(-5) = 1

e) 40 : ( -1 ) . ( -2 + 2)

40 : ( -1 ) . 0

40 : 0 = 0