proportions. skill maintenance page 61 commutative property addition 3 + 4 = 4 + 3 5 + 17 + 43 =...
DESCRIPTION
Commutative Property Addition = = Multiplication 3 * 4 = 4 * 3 2 * 7 * 8 = 8 * 2 * 7TRANSCRIPT
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Proportions
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Skill MaintenancePage 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 SkillsPage 62
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Word Problems with Proportions
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Word Problems with Proportions
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 ActivityPage 63
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HomeworkPages 163All ActivitiesAll Problems