Question

simplify 30 + -30 + - 60 + -18​

Answer 1

30 - 30 - 60 -18

= 0 - 78

= -78

Answer 2

=$30 + ( - 30) + ( - 60) + ( - 18)$

=$30 - 30 - 60 - 18$

=$30 - 108$

=$- 78$