Question

1000-(810:9)×3=
1000-(720:9)×4=

Answer 1

1000-(810:9)*3=730
1) 810:9=90
2) 90*3=270
3) 1000-270=730

1000-(720:9)*4=680
1) 720:9=80
2) 80*4=320
3) 1000-320=680