The signs used in arithmetic - Interactive Mathematics
https://www.intmath.com/blog/mathematics/the-signs-used-in-arithmetic-6391
The signs that we use in arithmetic are known to all, but their origin is not so familiar. The sign =, meaning equal to, was first used by [Welshman] Robert Recorde, of All Souls' College, Oxford, in 1531. To save himself the trouble of writing the words "equal to" again and again, he drew two little lines equal to one another. [He said "Noe 2 thynges can be moare equalle” than parallel lines. His symbol appears to be 5 times the current length of the equal sign, as we can see in T… login
The signs that we use in arithmetic are known to all, but their origin is not so familiar. The sign =, meaning equal to, was first used by [Welshman] Robert Recorde, of All Souls' College, Oxford, in 1531. To save himself the trouble of writing the words "equal to" again and again, he drew two little lines equal to one another. [He said "Noe 2 thynges can be moare equalle” than parallel lines. His symbol appears to be 5 times the current length of the equal sign, as we can see in T…
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