Question

456+125+67+90+67+45+23+45

Answer 1

1)456+125=581
2)581+67=648
3)648+90=738
4)738+67=805
5)805+45=850
6)850+23=873
7)873+45=918

Answer 2

456+125+ (67+23) +67+ (90+45+45) = (581+67) +90+ (90+90) = 648+3*90=

=648+270=918

или (456+67+67)+125+23+(90+45+45)=(456+134)+125+23+(90+90)=

=590+125+23+180=(590+180)+(125+23)=770+148=918