Typesetting ``errors'' in which exponents or multiplication signs are omitted but the resulting expression is equivalent
to the original one. Examples include

where a whole number followed by a fraction is interpreted as addition (e.g., ).

**References**

Dudeney, H. E. *Amusements in Mathematics.* New York: Dover, 1970.

Madachy, J. S. *Madachy's Mathematical Recreations.* New York: Dover, pp. 174-175, 1979.

© 1996-9

1999-05-26