Puzzle Detail
Subtraction Mathdoku Subtraction 7×7 Hard — Set 21
| 2 | 18+ | 6= | 1= | |||
| 3- | 17+ | 16+ | 3- | |||
| 7= | 1= | 2- | ||||
| 7= | 1= | 6 | 4- | 1- | 3- | |
| 1= | 9+ | |||||
| 6= | 17+ | 12+ | ||||
| 13+ | 6+ | 2= | 12+ |
Show solution
| 4 | 5 | 2 | 7 | 3 | 6 | 1 |
| 2 | 3 | 5 | 6 | 7 | 1 | 4 |
| 5 | 7 | 3 | 1 | 6 | 4 | 2 |
| 7 | 1 | 6 | 2 | 4 | 5 | 3 |
| 1 | 2 | 4 | 3 | 5 | 7 | 6 |
| 3 | 6 | 7 | 4 | 1 | 2 | 5 |
| 6 | 4 | 1 | 5 | 2 | 3 | 7 |
Solver Notes
Our subtraction mathdoku puzzles focus exclusively on subtraction cages, making them ideal for practicing arithmetic while enjoying a logic challenge.
What are subtraction mathdoku puzzles?
Subtraction mathdoku puzzles restrict every cage to a single subtraction calculation. This makes them excellent for drilling that one operation.
Who are these puzzles for?
They suit anyone from elementary students learning subtraction to adults who enjoy arithmetic logic puzzles.
Are solutions included?
Yes — every subtraction mathdoku on Freemathdoku.com comes with a full solution so you can check your work.