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Evaluating Expressions

Evaluating Expressions. S3: C3: PO 2. Evaluate an expression containing variables by substituting rational numbers for variables. Key Terms. Variable: number we don’t know (use a letter) Expression: mathematical phrase (does not have an equals sign) Evaluate: Find the answer

uriel-wolfe
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Evaluating Expressions

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  1. Evaluating Expressions S3: C3: PO 2. Evaluate an expression containing variables by substituting rational numbers for variables.

  2. Key Terms • Variable: number we don’t know (use a letter) • Expression: mathematical phrase (does not have an equals sign) • Evaluate: Find the answer • Equation: mathematical sentence (HAS an equals sign) • Substitute: replace

  3. Evaluate the following if a = 12 and b = -3. Example 1: Replace all a’s with 12 and b’s with -3.

  4. Evaluate the following if a = -4 and b = -3. Example 2: Replace all a’s with –4 and b’s with -3.

  5. Evaluate the following if a = 12 and b = -3. Example 3: Replace all a’s and b’s.

  6. Evaluate the following if a = 0.75 and b = -2/3. Example 4: Replace all a’s and b’s.

  7. Evaluate the following if a = 0.5 and b = 1/4 Example 5: Replace all a’s and b’s.

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