A horse or bullock of 80. D value would require a notation of 6. figures, to wit 115,200, and the public debt, suppose of 80. millions, would require 12. figures, to wit 115,200,000,000 units. Such a system of money-arithmetic would be entirely unmanageable for the common purposes of society. I proposed therefore, instead of this, to adopt the Dollar as our Unit of account and payment, and that it's divisions and sub-divisions should be in the decimal ratio. I wrote some Notes on the subject, which I submitted to the consideration of the financier.英文原著 · 《AUTOBIOGRAPHY》
From Bonn (whence we made one or two Rhine excursions, and where we ascended twenty-eight "blessed steps" on our knees--the chapel people called them "blessed steps;" WE didn't, after the first fourteen) we returned to Cologne. From Cologne we went to Brussels; from Brussels to Ghent (where we saw more famous pictures, and heard the mighty "Roland" ring "o'er lagoon and lake of sand"). From Ghent we went to Bruges (where I had the satisfaction of throwing a stone at the statue of Simon Stevin, who added to the miseries of my school-days, by inventing decimals), and from Bruges we came on here.英文原著 · 《Diary of a Pilgrimage》
In Arithmetic, the various operations in addition, subtraction, multiplication, and division, reduction, simple and compound proportion, and vulgar and decimal fractions, must be thoroughly understood and readily performed.英文原著 · 《Henry Ossian Flipper》
In ARITHMETIC they must be able to perform with facility examples under the four ground rules, and hence must be familiar with the tables of addition, subtraction, multiplication, and division, and be able to perform examples in reduction and in vulgar and decimal fractions, such as--英文原著 · 《Henry Ossian Flipper》
They must also be able to change vulgar fractions into decimal fractions, and decimals into vulgar fractions, with examples like the following:英文原著 · 《Henry Ossian Flipper》