Math Square #170
If it's a math challenge you're after, you'll enjoy the Monday Math Square, a regular weekly feature in our series of mentalfloss.com Brain Games. Good luck!
Place the digits 1 through 9 in the white blanks so that the mathematical equations work both across and down. Each digit 1 through 9 should appear only once in the main grid (the red square).
NOTE: These puzzles rarely (but occasionally) have alternate solutions that fit the rules. If you find one of these, first make sure that you've followed the instructions to the letter, then pat yourself on the back (and feel free to share your numbers with us in the comments).