The nine squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in the mail grid. One of these numbers (the 2) is already provided for you. Place the other digits in the correct spots so that the mathematical equations work both across and down. Remember your algebraic rules when solving the problems... multiplication and division should be solved first, then addition and subtraction. Good luck!
Here is the SOLUTION.