v21’s Twitter Archive—№ 44,791

RT @jmccyoung: The myth that it is easier to multiply and divide with Hindu-Arabic numerals than with Roman ones thonyc.wordpress.com/2017/02/10/the-widespread-and-persistent-myth-that-it-is-easier-to-multiply-and-divide-with-hindu-arabic-numerals-than-with-roman-ones/