Question

10-18+(-4-5+18)-2+20-30)×-5?

Answer 1

= 10 - 18 + ( - 4 - 5 + 18) - 2 + 20 - 30). (- 5)
= - 8 + [( - 9 + 18) + 18 - 30] . (- 5)
= - 8 + [ 9 - 12] . (- 5)
= - 8 + [ - 3].(-5)
= - 8 + 15
= 7

Answer 2

10-18+[(-4-5+18)-2+20-30] . (-5)

10-18+[(-9+18)-2+20-30] . (-5)

10-18+[9-2+20-30] . (-5)

10-18+[7-10] . (-5)

10-18+[-3] . (-5)

10-18+15

-8 + 15

7