This resource only just missed our Christmas Activities eBook.
It is a MathDoku, or KenKen type puzzle. We've simplified the more traditional version so that it only includes addition.
The idea is for the children to work together to complete each 5x5 grid - they only have a small number of clues and a few simple rules to follow.
The rules are that:
- the numbers entered into each 'cell' (a number of squares marked out by darker lines) should total the clue number in the top left-hand corner of the cell;
- only the numbers 1, 2, 3, 4 and 5 should be used;
- as with Sudoku, no number can appear on any row or column more than once.
The pdf file attachment below includes four KenKen puzzles (together with answers).
If you think this is a worthwhile addition to this site, and would like more, please let me know using the comment box below.