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# Who invented the current mathematical plus and minus signs?

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The likelihood is that the signs (+) and negative (-) derive from the associated math operations of addition (+) and subtraction (-) when performed on a null set (zero). The Welsh mathematician Robert Recorde (1510-1558), the designer of the equals (=) sign, introduced the modern use of plus and minus symbols to the UK in 1557. The Chinese worked with negative numbers as early as 200 AD, and mathematicians in India (either concurrently or later) used the (+) sign for negative numbers. Resistance to negative solutions was expressed by the Greeks, and later by Europeans as late as the year 1800. This seems hard to explain when we see that businesses routinely used "credits" and "debits" to their accounts during the entire period.
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# Plus minus sign first used?

Michael Stifel in 1544.

# What is the mathematical sign for half a minus sign?

  This is non-sensical.

# Do two plus signs make a minus?

In addition and subtraction, if the plus sign is larger than the  minus sign, then it's a plus. For example:    +10 minus -20 = -10    If the plus sign is small

# How do you make a plus minus sign with the keyboard?

go to the character map in the start menu. (for PC)

# Who invented the minus sign?

none other than Kate Punzalan

# Who introduced the plus and minus signs?

Michael Stifel in 1544.

# How is the plus and minus voltage sign for resistance voltage drops for battery voltages and currents be determined?

The plus and minus voltage sign for resistance voltage, drops for battery voltages, and drops for currents is determined by convention. You can use whatever method you want -

# Who invented minus sign?

No one invented the minus sign or at least none that we know of, it is simply part of the evolution of mathmatics. The minus sign we use appeared in the 1400s

# What prefixes an be used in mathematical expression consisting of two terms connected by a plus or minus sign?

aba, Malay ko sayo wiki.answers.com BOBO mo kasi

# Who came up with the plus and minus sign?

Michael Stifel in 1544.

The person who invented the plus sign is the same as the minus

# Why do 2 minus signs make a plus sign?

The - sign means negative so -- would mean negative negative and 2 negatives make a positive. hope this makes sense

# How do you make a plus or minus sign on a mac?

Shift-Option-Plus (+) will produce the Â± symbol on a Mac.
In Algebra

# What does the plus sign over the minus sign mean?

less than or more

# How can you use plus signs and minus signs to define a search?

The exact meaning of plus and minus signs depends on the search tool, but most often plus means "and" and - means "and not", so that "pie + apple - cherry" would return result
In Science

# What does the plus over the minus sign mean?

plus or minus. You see it often with square roots. The square root  of 9 is plus or minus 3.
In Biology

# What is the relationship between the plus and minus sign?

They are indicators of additive opposites.