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Chapter 11 Rational Equations and Functions
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11.1 Ratio and Proportion Review expressions and equations by having students create a Double Bubble Map.
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Expressions and Equations Put student example here
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Ratios What do students already know/remember about ratios? –Have students create a circle map Framework –Definition –Numerical examples –Real world examples
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Ratios Definition Numerical examples Real world examples
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Proportions Start proportion Circle Map. Have students add to map as more examples are found
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Proportions Definition Numerical examples Real world examples
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ratio =
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Class will create a Flow Map detailing steps to solve proportion word problems. Students will create Double Flow Maps while solving homework problems.
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Percents Review percents by having students complete a Circle Map.
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12% Framework—what do you do to get other forms? You divide percentage by 100 to get decimal forms. You place percentage over 100 to get a fraction.
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Solving percent word problems. Refer back to the proportion Brace Map. Percent word problems are a specific type of proportion problem.
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ratio = Numerator-- Part of a whole Denominator-- Whole amount Numerator-- Percentage Denominator-- 100
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Student Activity Have students complete brace maps for percent word problems substituting the values from the problems for the verbal description of parts.
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234 424 x 100 234 424 = X 100 234 = X 424 100 There are 234 boys at Parry McCluer High School. If there are 424 students at PMHS, what percent of the students are boys?
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Direct and Inverse Variation Introduce topic using a Tree Map to compare and contrast direct and inverse variations. Include formulas, definitions, and examples. (Add example here)
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Use Bridge Maps to give examples of direct and indirect variation. Have students add their own examples to create a bulletin board display.
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Direct and Inverse Variation On the second day, as part of the class warm-up, have students create a Double Bubble Map comparing and contrasting direct and inverse variations. (Add student example here)
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Simplify Rational Expressions Students will create circle map and will continue to add to it as new examples of rational expressions are found. –Framework What makes it a rational expression
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Rational Expressions Examples of rational expressions What makes it a rational expression
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Multiplying and Dividing Rational Expressions Have students create flow map explaining process as teacher works examples.
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4x. x-3. 2 2 x - 9 8x + 12x 4x. x - 3. (x +3)(x – 3) 4x(x + 3) 1 × 1 (x + 3)(x + 3) 1 2 (x + 3) Multiply Rational Expressions
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4x ÷ x-3. 2 2 x - 9 8x + 12x 4x. x - 3. (x +3)(x – 3) 4x(x + 3) 1 × 1 (x + 3)(x + 3) 1 2 (x + 3) Divide Rational Expressions
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