This is an equation puzzle.
Fill in the blanks so that each row and column makes a true equation. (first puzzle)
This is an equation puzzle.
Click on each blank to change the sign so that each row and column makes a true equation. (second puzzle)

This is an equation puzzle Fill in the blanks so that each row and column makes a true equation first puzzle This is an equation puzzle Click on each blank to c class=
This is an equation puzzle Fill in the blanks so that each row and column makes a true equation first puzzle This is an equation puzzle Click on each blank to c class=