190-(18+12)+(17+40)=?

Question

190-(18+12)+(17+40)=?

Answer 1

190-30+57=

=190-87=

=103=

Answer 2

190-(18+12)+(17+40)= 103
1)18+12=30
2)17+40=57
3)30+57=87
4)190-87=103