Start by filling in the numbers that are given at the start of each row and column. Use the mathematical operations provided to deduce the missing numbers, ensuring they match the totals shown.

No, Crossmath is designed to be solved using mental math and logical reasoning. Calculators are not allowed to maintain the challenge and educational value of the game.

Each puzzle has a unique solution. Once you fill in all the squares, check that the numbers in each row and column, when combined with the operations given, match the totals shown at the start of the rows and columns.

Yes, Crossmath offers puzzles of varying difficulty levels, from beginner to advanced. The complexity increases with the number of operations, the size of the grid, and the range of numbers used.