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The Surprisingly Short History Of The Plus Sign - Fast Company 06-23-2014 DESIGN The Surprisingly Short History Of The Plus Sign Before the 16th century, most math equations were written as metered verse Thank god for graphic-design-inclined mathematicians
Addition - Wikipedia Addition 3 + 2 = 5 with apples, a popular choice in textbooks [1] Addition, usually denoted with the plus sign +, is one of the four basic operations of arithmetic, the other three being subtraction, multiplication, and division The addition of two whole numbers results in the total or sum of those values combined
Plus–minus sign - Wikipedia The plus–minus sign or plus-or-minus sign (±) and the complementary minus-or-plus sign (∓) are symbols with broadly similar multiple meanings In mathematics, the ± sign generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction