Solving a Cross Sum Puzzle - Do try this at home

Cross Sum is a simple math puzzle, where the numbers 1 to 9 are placed in a 3 by 3 grid, with operators in between. You have to solve the 6equations – 3 horizontally, 3 vertically – matching the results at the right and at the bottom of the grid. There are some additional rules:

- Calculate from left to right: 1 + 3 x 4 = 16, not 13
- The first operator can be plus or minus, the second can be all four
- The intermediate result and the end result have to be zero or greater
- Only integer numbers (whole numbers) are allowed, no fractions

Cross Sum Standard lets you:

- Create standard Cross Sum puzzles with numbers 1-9
- Using the ‘standard’ operators for these puzzles – the first one can be plus or minus, the second one can be anything
- Only whole numbers (integer numbers) are allowed
- Customize the font, colors, line width and canvas color
- Create Instant Puzzle Books
- Sell your puzzles and puzzle books

For rebels amongst us, there’s also a version that breaks the rules: Use different numbers, negatives, fractions, or even use the regular math operator precedence, in Cross Sum Variations (see “Product Comparison” below).

If you’re publishing puzzles on your website, publishing puzzle books on KDP, selling printables, or need unique content for your website or social media, Puzzle Maker Pro – Cross Sum Standard will help you achieve your goals. Whether you need just one puzzle for your website, or 100’s for a sudoku puzzle book, this is the most flexible and customizable sudoku software available anywhere.