What does +/- mean in math?

(mathematics) the symbol ±, meaning “plus or minus”, used to indicate the precision of an approximation (as in “The result is 10 ± 0.3”, meaning the result is anywhere in the inclusive range from 9.7 to 10.3), or as a convenient shorthand for a quantity with two possible values of opposing sign and identical magnitude …

How do you do the plus sign on the keyboard?

To create a plus using a U.S. keyboard, hold down the Shift and press the + . It is on the same key as the equals sign ( = ), next to the backspace key.

What does an equal sign with a line through it mean?

Answer: An equal sign with a line through it, i.e., ≠, means ‘Not equal to’ The list of math symbols is endless.

What do three equal lines mean?

A symbol with three horizontal line segments ( ) resembling the equals sign is used to denote both equality by definition (e.g., means is defined to be equal to ) and congruence (e.g., means 13 divided by 12 leaves a remainder of 1–a fact known to all readers of analog clocks).

What is equal to in math?

The equal sign in mathematics describes equality between the values, equations, or expressions written on both sides. The symbol for equal to is two small horizontal lines placed parallelly. We place the ‘equal to’ sign is between two things that are the same or equal. Examples: 1 + 1 = 2.

What is the em dash?

The em dash is perhaps the most versatile punctuation mark. Depending on the context, the em dash can take the place of commas, parentheses, or colons⁠—in each case to slightly different effect. Do not mistake the em dash (—) for the slightly narrower en dash (–) or the even narrower hyphen (-). …

How do you make a positive and negative symbol?

The Plus or Minus Symbol alt code is 0177. Even though this Symbol have no dedicated key on the keyboard, you can still type it on the keyboard with the Alt code method. To do this, press and hold the Alt key whilst pressing the Plus Minus Symbol Alt code (i.e. 0177) using the numeric keypad.

How do I get the em dash key?

For an em-dash, hold down the Alt key and type 0151, then release the Alt key. That’s it! For an en-dash, hold down the Alt key and type 0150, then release the Alt key.