Variables and Expressions

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Variables and Expressions

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Presentation transcript:

Variables and Expressions Objective: Students will write mathematical expressions for verbal expressions and write verbal expressions for mathematical expressions. S.Calahan 2008

copyright 2006 www.brainybetty.com Words to know Variable – symbols used to represent unspecified numbers or values. Algebraic expressions – one or more numbers and variables along with one or more arithmetic operations. Factors – quantities being multiplied resulting in a product. 11/21/2018 copyright 2006 www.brainybetty.com

copyright 2006 www.brainybetty.com Words to know Evaluate – to find its value. Base- in the expression xn, x is the base Exponent – in the expression xn, n is the exponent. The exponent indicates the number of times the base is used as a factor. 11/21/2018 copyright 2006 www.brainybetty.com

copyright 2006 www.brainybetty.com Adding Words Plus more more than sum increased 11/21/2018 copyright 2006 www.brainybetty.com

copyright 2006 www.brainybetty.com Subtracting words Minus Difference Decreased Less than less 11/21/2018 copyright 2006 www.brainybetty.com

copyright 2006 www.brainybetty.com Multiplication words Times Product Of Cubed Squared twice 11/21/2018 copyright 2006 www.brainybetty.com

copyright 2006 www.brainybetty.com Division Words Divide Quotient Ratio 11/21/2018 copyright 2006 www.brainybetty.com

Write Algebraic Expressions Eight more than a number n More than suggest addition A number leads to our variable n 8 + n 11/21/2018 copyright 2006 www.brainybetty.com

7 less than the product of 4 and a number x Less implies subtraction and product implies multiply. Less than tells us the 7 is subtracted 4x - 7 11/21/2018 copyright 2006 www.brainybetty.com

One third of the size of the original area a The word of implies multiply. 1 a or a 3 3 11/21/2018 copyright 2006 www.brainybetty.com

Verbal expressions to algebraic expression 23f Twenty-three times f 11/21/2018 copyright 2006 www.brainybetty.com

copyright 2006 www.brainybetty.com The product of 5 and m squared plus 2 Five times m squared increased by two 11/21/2018 copyright 2006 www.brainybetty.com

copyright 2006 www.brainybetty.com Four times a number squared divided by 7 One seventh of 4 times a n squared 11/21/2018 copyright 2006 www.brainybetty.com