Math Hole Puzzle

This is a casual puzzle game. There's an unknown black hole in the equation. You need to calculate the missing number based on the equation and move the black hole to swallow as many blocks with corresponding numbers as possible. Each block swallowed adds a point to the game progress bar. You need to complete the progress bar to 100% to pass the level. You only have 5 minutes to complete the task! Let's see who can get the most points!