How to Evaluate Expressions by Substituting Values
Learn what it means to evaluate algebraic expressions, how to substitute values step by step, and what mistakes to avoid.
Math Word of the Day comes from the Math Dictionary written by Mathnasium.
Sunday, October 11
A system which includes self-evident truths; truths without proofs and from which further statements, or theorems, can be derived.

Monday, October 12
Directed or facing the rear.
Done in a manner or an order that is opposite to a previous occurrence.

Tuesday, October 13
The side or face of a geometric figure to which an altitude is drawn.
The number that is raised to a power (an exponent).
The number that is raised to a power to generate the whole numbers of a number system. The base of the decimal system is 10; the base of the binary system is 2.

Wednesday, October 14
In an intermediate space, position, or time.

Thursday, October 15
Numbers that are used to help make calculations and estimates.
Important benchmark numbers include 0, 1/10, 1/2, 1, 10, 12, and 100.

Friday, October 16
A system of numerical notation that has 2 rather than 10 as a base.

Saturday, October 17
An operation that combines two objects of one type to form another object of the same type.
In a binary arithmetic operation, a starting number (the operand) is acted on by an operation (+, -, X, ÷) and a second number (the operator), producing a result.
We can say that a binary operation transforms one number into another by means of a given operation.
Operand [+, -, X, ÷] Operator = Result

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