20 + 10 - 10 =, 30 - 10 + 10 =, 40 + 10 - 20 =, 20 + 10 - 10 + 10 =, 30 + 20 - 10 - 10 =, 40 - 10 + 10 - 10 =

Leaderboard

Visual style

Options

Switch template

Continue editing: ?