Puzzle Copyright © Kevin Stone

**Objective / Rules**

- Complete the grid using all of the numbers from 1 to 9.
- When completed, all of the sums must be correct.
- The sums are solved strictly from left to right, and top to bottom.
- The normal order of mathematical operations is ignored.
- For example, 2 + 5 x 9 is calculated as (2 + 5) x 9 = 63.
- ÷ 1 doesn't appear in the puzzle.
- x 1 doesn't appear in the puzzle (although there might be 1 x).
- At no point will any calculation go below zero or become fractional.