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Writing Expressions and Equations. Key Vocabulary. Expression – a math sentence without equal signs Equation – a math sentence with equal signs Variable – a letter that is used to represent a number Terms – the part of an expression that is being added together. Key Vocabulary.
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Key Vocabulary Expression – a math sentence without equal signs Equation – a math sentence with equal signs Variable – a letter that is used to represent a number Terms – the part of an expression that is being added together
Key Vocabulary Coefficient – the number part of the term that has a variable with it Constant Term – a term that has a number but no variable Like Terms – terms that have identical variables Inverse Operation – the opposite operation used to solve an equation
Expressions vs Equations Expressions – written as phrases Example – the sum of six and a number x + 6 Equations – written as sentences Example – the sum of six and a number IS ten x + 6 = 10
Translating Verbal Phrases A number increased by 5 7 less than a number 3 more than twice a number 4 decreased by the quotient of a number and 7
Translating Verbal Sentences 16 increased by a number is 27 The difference of twice a number and 3 equals -4 The product of ½ and a number is 36 -3 is equal to twice the sum of a number and 2