# 06 1st six weeks vocabulary

## Terms

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algebra
a mathematical language that uses symbols, ususally letters, along with numbers. The letters stand for numbers that are unknown.
algebraic expression
A combination of variables, numbers, and at least one operation.
base
In a power, the number used as a factor. In 10(3), the base is 10. (10 x 10 x 10)
clustering
An estimation method in which a group of numbers close in value are rounded to the same number.
compare
<, >, or =
compatible numbers
Numbers that are easy to divide mentally.
composite numbers
A number greater than 1 with more than two factors.
cubed
The product in which a number is a factor three times. Two cubed is 8 because 2 x 2 x 2 = 8.
equation
A mathematical sentence that contains an equals sign (=).
equivalent
is equal to
evaluate
To find the value of an algebraic expression by replacing variables with numbers.
exponent
In a power, the number of times the base is used as a factor. In 5(3), the exponet is 3. That is, 5(3) = 5 x 5 x 5.
factor
A number that divides into a whole number with a remainder of zero.
greatest common factor (GCF)
The greatest of the common factors of two or more numbers. The GCF of 24 and 30 is 6.
integer
The whole numbers and their opposites . . . . -3, -2, -1, 0, 1, 2, 3 . . .
inverse operation
Operations which undo each other. For example, addition and subtraction are inverse operations.
least common multiple (LCM)
The least of the common multiples of two or more numbers. The LCM of 2 and 3 is 6.

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