Lesson 1.1 Expressions and Variables OBJ: To translate verbal phrases into expressions.

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Presentation transcript:

Lesson 1.1 Expressions and Variables OBJ: To translate verbal phrases into expressions.

Definitions Numerical Expression – an expression containing only numbers and operations. Variable – a letter used to represent one or more numbers. Variable Expression – an expression containing numbers, variables, and operations.

Words meaning… ADDITION Sum Plus Total More than Increased by Added to SUBTRACTION Difference Less than Less Minus Decreased by Fewer than Subtracted from

Words meaning… MULTIPLICATION Times Product Multiplied by Of Twice DIVISION Quotient Divided by Divided into

Sample Problems Translate each phrase by using a variable 3 times the sum of 7 and a number y. 2 dollars less than Judy had yesterday Twice a number 25 percent of a number 4 less than the quantity 6 times a number.

Try These 1.Fifteen decreased by 4 times a number 2.Twice the sum of 6 and a number 3.The difference of 5 and a number divided by divided by the square of a number 5.If Chris can solve x algebraic equations per minute, how many equations can he solve in four minutes?