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Evaluate Addition and Subtraction Expressions

Evaluate Addition and Subtraction Expressions. SWBAT find the value of algebraic expressions involving addition or subtraction. What does it mean to evaluate?. Find the worth of something Replace the variable with a given number Compute the value of the expression Evaluate 10 – x when x = 8

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Evaluate Addition and Subtraction Expressions

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  1. Evaluate Addition and Subtraction Expressions SWBAT find the value of algebraic expressions involving addition or subtraction

  2. What does it mean to evaluate? • Find the worth of something • Replace the variable with a given number • Compute the value of the expression Evaluate 10 – x when x = 8 10 – x - replace x with 8 10 – 8 subtract 2

  3. Evaluate the following when c = 0.75 and d = 2.06 • 8 + c + d • 35 – c – d • C + 5.37 + d • 5 + c – d • D + 0.02 - c

  4. Evaluate the following when c = 0.75 and d = 2.06 Try these on in your groups: • c + d + 5.5 • 10 – c – d • d + 12.8 + c • 14.9 – c + d • 8.31 • 7.19 • 15.61 • 16.21

  5. Write and expression for the situation, then evaluate. • Miguel had x dollars. He spend $ 16.25 of that amount. What expression represents the amount of money he has left? Evaluate the expression when x = $34.10 • Alex scored 5 points fewer than Devon. Devon scored 14 points. What expression show the number of points Alex scored? Evaluate the expression

  6. Write and expression for the situation, then evaluate. Try this with your group • Let y represent the number of home runs Maddy hit last season. Brianna hit 6 more home runs than Maddy. What expression shows how many home runs Brianna hit? How many did she hit when y equals 8?

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