2000, Karl J. Smith, Mathematics: its power and utility^{[1]}, 6, illustrated edition, Brooks/Cole Pub. Co., ISBN9780534364557:
Since ten basic symbols are used, the Hindu-Arabic numeration system is also called the decimal numeration system, from the Latin word decem, meaning "ten."
2008, Stan Gibilisco, Algebra Know-It-All: Beginner to Advanced, and Everything in Between, illustrated edition, McGraw-Hill Professional, ISBN9780071546171, page 8:
The numeration system we use today was invented in the seventh century by mathematicians in Southern Asia. During the next two or three hundred years, invaders from the Middle East picked it up. Good ideas have a way of catching on, even with invading armies! Eventually, most of the civilized world adopted the Hindu-Arabic numeration system. The "Hindu" part of the name comes from India, and the "Arabic" part from the Middle East. You will often hear this scheme called simply Arabic numerals. [...] In an Arabic numeral, every digit represents a quantity ranging from nothing to nine. These digits are the familiar 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
2008, Leonard M. Kennedy, Steve Tipps, Art Johnson, Guiding Children's Learning of Mathematics, 11, illustrated edition, Cengage Learning, ISBN9780495091912, page 144:
The Hindu-Arabic numeration system is a base-10 system that developed in Asia and the Middle East. [...] Ten symbols—0, 1, 2, 3, 4, 5, 6, 7, 8, 9— are the numerals in the system.
2009, Richard N. Aufmann, Joanne Lockwood, Richard D. Nation, Daniel K. Clegg, Mathematical Excursion, Enhanced Edition, 2 edition, Cengage Learning, ISBN9780538734998, page 187:
The most common numeration system used by people today is the Hindu-Arabic numeration system. It is called the Hindu-Arabic system because it was first developed in India (around A.D. 800) and then refined by the Arabs. It makes use of the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. The reason for the 10 symbols, called digits, is related to the fact that we have 10 fingers. The Hindu-Arabic numeration system is also called the decimal system, where the word decimal is a derivation of the Latin word decem, which means "ten."