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Chapter 1, Lesson 1

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Chapter 1, Lesson 1

1. 1. 7 th Grade Pre-Algebra Chapter 1-1
2. 2. Terms and Concepts (A) <ul><li>Algebraic expression: a mathematical expression describing real world situation </li></ul><ul><ul><li>Ex. 45 * n </li></ul></ul><ul><li>Variable: a letter in an algebraic expression that represents an unknown value </li></ul><ul><ul><li>The letter n in the above example </li></ul></ul><ul><li>Constant: a specific number in an algebraic expression </li></ul><ul><ul><li>The number 45 in the above example </li></ul></ul>
3. 3. Terms and Concepts (B) <ul><li>Numerical expression: an expression containing only numbers and mathematical operations </li></ul><ul><ul><li>Ex. (3 + 8) * (6-2) + 8 * 9 </li></ul></ul><ul><li>Factor: quantity being multiplied in a multiplication problem </li></ul><ul><li>Product: the result of multiplying factors </li></ul><ul><li>Equation: a mathematical sentence containing an equals sign. </li></ul><ul><ul><li>May contain numbers and variables </li></ul></ul>
4. 4. Class assignment <ul><li>Work the examples on page 5 </li></ul><ul><ul><li>Problems 1-8 </li></ul></ul><ul><li>Work on pages 6-7 </li></ul><ul><ul><li>Problems 4-13 </li></ul></ul><ul><ul><li>Problems 14-42 (evens) </li></ul></ul>
5. 5. Homework Assignment <ul><li>Do page 1 questions 1-18 (all) from the practice workbook. </li></ul><ul><li>Create an example of a real world algebraic expression. Give both the verbal expression and the algebraic expression. </li></ul>