In 1585 he published La Theinde (The tenth), a twenty-nine page booklet in which he presented an elementary and thorough account of decimal fractions.
Sa 1585 siya nai-publish La Theinde (Ang ikasampu), isang dalawampu't-siyam na pahina na kung saan siya sa buklet na ipinapahayag ng elementarya at masusing account ng decimal fractions.