The addition symbol was first used in 1544 by Michael Stiple. I do not know when the subtraction sign was first used, I'm still trying to find that out myself!
15th Century by Johannes Widmann
15th Century by Johannes Widmann
the 16th century, specifically 1544.
In the sixteenth century, mathematicians began using the symbols "+" for addition and "−" for subtraction to simplify mathematical notation and enhance clarity in calculations. These symbols helped streamline the representation of operations, making it easier to convey complex ideas without lengthy verbal descriptions. The adoption of these symbols was part of a broader movement towards standardization in mathematical practices, which facilitated communication and learning in the field.
19th century.....sorry this is all i know....
Same mathematical signs equal plus Different mathematical signs equal minus Plus Plus = Plus (+)(+) = + Minus Minus = Plus (-)(-) = + Plus Minus = Minus (+)(-) = - Minus Plus = Minus (-)(+) = - So the direct answer to your question would be: plus minus equals minus
A plus + a plus is a plus.
A minus and a minus makes a plus A plus and a plus makes a plus A minus and a plus or plus and a minus makes a minus 7 - -2 is a minus and a minus Therefore the answer is 7 + 2 = 9
@ turn of the century, plus or minus a few decades
2
Yes it does. A minus is the opposite of something, so the minus of a minus is a plus.
A plus with a minus under it means "plus or minus" in math.