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An angle that is less than 90 degrees.
an adding of two or more numbers to get a number called the sum
Example: 5+5 = 10 10 is the sum
area of math dealing in representing numbers with letters
Example: x+5=8 solve for x
The space (measured in degrees) between two lines that start from the same point.
A unit of length equal to one hundred-millionth (10-8) of a centimeter, used especially to specify radiation wavelengths.
The measure of the amount of space a two-dimensional figure takes up.
"the art of computing using addition, subtraction, multiplication, and division"
The property that an expression, in a fixed order, will produce the same result no matter how adjacent items are grouped.
Example: (a+b)+c = a+(b+c)
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