Pre-Algebra

Pre-Algebra

During the Summer I will post a topic and a problem. The first student to log on will work the problem and discuss how they solved it. Then, they will need to post another problem. As student log on they will work the problem from the previous student and explain their results. You need to review the other problems and if you have questions, comments or corrections please post them. Students need to post a minimum of 1 time every week.
 * **Variables and Expressions**

An algebraic expression uses at least one letter (called a variable) and the variable represents a value that can change. The number that multiplies a variable is called the **coefficient.** A **constant** is a specific number, whose value never changes. To **evaluate** an algebraic expression, **substitute** a given number for a variable and find the value of the resulting numerical expression.

Follow the ORDER OF OPERATIONS: 1. Parentheses 2. Multiply or Divide 3. Add or Subtract

Example: Evaluate 5(m+1) +8n for m=10 and n=2 This is how to **SHOW YOUR WORK:** 5(m+1) + 8n 5(10+1) + 8(2) Substitute the values of m and n 5(11) + 8(2) Parentheses 55 + 16 Multiply 71 Add

Problem # 1: Evaluate 8c-6(d+5) for c=5 and d=3 || Cancel ||  ||  ||   ||
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