alleryWho first used the horizontal fraction bar, as attested?
AAl-Hassār
BBrahmagupta
CNapier
DStevin
Answer & Solution
Correct answer: A. Al-Hassār
1. The bar between numerator and denominator is first attested around 1200.
2. It appears in the work of Al-Hassār, a Muslim mathematician from Fez.
3. Brahmagupta wrote without a bar, and Napier and Stevin are linked with decimal notation.
_Source: Wikipedia, Fraction, section History_
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