Elementary School, Primary School, Middle School.
Columnar addition of multiple summands.
A series of natural positive numbers has to be added in written columnar form.
The number of summands and the number of places for the summands can be chosen.
With respect to carries, it may be specified that
- no carries may occur
- carries may only occur every other digit, so that a column where a carry has been added will never produce another carry
- carries may randomly occur.
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