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Published byLeon Boone Modified over 8 years ago
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Proportions
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Skill Maintenance Page 61
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Commutative Property Addition 3 + 4 = 4 + 3 5 + 17 + 43 = 17 + 43 + 5 Multiplication 3 * 4 = 4 * 3 2 * 7 * 8 = 8 * 2 * 7
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Substitution Important concept when working with variables Substitution: Replace a variable with a number value
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Ratios Ratio: Compares two numbers –Represent a part-to-whole relationship –Represent a part-to-part relationship Fraction is a special type of ratio (part-to-whole)
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Variables in Formulas One of the most powerful uses of variables in formulas. We use substitution to replace the values we know. Variables and formulas help solve problems in geometry.
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Proportions Proportion: Two ratios that are equal Work for multiplication type ratios
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Apply Skills Page 62
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Word Problems with Proportions
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Read the problem
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What is the problem asking?
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What do we Know?
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Problem Solving Activity Page 63
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Homework Pages 163 All Activities All Problems
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