convert sumti to mex operand; sample use in story arithmetic: [3 apples] + [3 apples] = what.

- mo'e
- convert sumti to mex operand; sample use in story arithmetic: [3 apples] + [3 apples] = what.

- ci zei mektika
- x
_{1}is a part of Lojban text representing rule 'operand-3' according to the first edition of the book 'The Complete Lojban Language'.