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What is one minus two plus three minus four plus five?
3.
What is eighteen plus one?
Twenty minus one.
What does the plus minus symbol mean?
The plus minus symbol means both plus and minus should be considered; or thata measurement or estimate may be plus or minus the number after the sign.For example, a measured temperature may be state as 123 +/- 0.2 C, which means temperature may be between 122.8 C and 123.2 C.An estimated attendance at an eventmay be given as 2500 +/- 100 , which means attendance should be between 2400 and 2600.The quadratic formula contains a plus minus sign, meaning that there are two roots to beobtained and given consideration.For example, t = 30 +/- 40 which means the answer may mathematically be 70 or - 10 , Realistically, the answer may be either or both numbers.
What does a plus and a minus make?
-- If they're being multiplied or divided, then they make a minus. -- If they're being added or subtracted, then they can make either a plus or a minus. It depends on which one is bigger.
What is negative seven minus negative one?
-7--1=6. A double minus makes a plus.
