How to solve kakuras (sudoku)
To simplify I show you
just 1 row:
I II III IV
○ ○ ○ ○ 7
You need to get 7 by adding some numbers.
3 + 4 = 7
I II III IV
○ ○ • • 7
3 and 4 are activated.
solved
the alternative solution:
1+2+4 = 7
I II III IV
• • ○ • 7
1, 2, 4 are activated
The hard part that you have multiple columns and rows.
The sums must be correct in all of them.