Question

(39-19).(-4)+30.(-5-15)

Answer 1

(39 - 19).(-4) + 30.(-5 - 15)

= 20.(-4) + 30.(-20)

= 20.(-4 - 30)

= 20.(-34)

= -680

Answer 2

=20.(-4)+30.(-20)

=20.(-4+30)

=20.26

=520

Answer 3

(39-19)(-4)+30(-5-15) = 20(-4)+30(-20) = 20.4.(-1) +30.20.(-1) = (-20)(30+4) = (-20).34 = -680