Presentation on theme: "Day 1 1. List all words that would describe the following: AdditionSubtraction Multiplication Division 2. Write the following as algebraic expressions:"— Presentation transcript:
Day 1 1. List all words that would describe the following: AdditionSubtraction Multiplication Division 2. Write the following as algebraic expressions: a.) the sum of p and 8 b.) three less than b c.) the sum of twice a number and 31 d.) nine less than five times a number Sum Added to Plus More than Difference Subtracted from Minus Less than Product Multiplied by Times Twice Quotient Divided by p + 8 b – 3 2n+31 5n – 9
I can write an algebraic expressions. 1.1 Using variables in expressions 1.2 Exponents & Order of Operations Dont forget to write this I Can in your target sheet. (Bold words above are to signal those words were listed as an objective on the pre-test) I can simplify numerical expressions using order of operations. I can evaluate expressions. I can define a variable and write an expression/equation.
Variable - A symbol that represents one or more numbers. Algebraic Expression - A mathematical phrase that can include numbers, variables, and operation symbols. 1.1 Using variables in expressions 1.2 Exponents & Order of Operations
Ex 1. Write the following algebraic expressions in words: a.) h + 7 b.) 6 – p c.) 5d + 2 Ex 2. Define the variables and write an equation for the following: a.) total income from selling tickets to a school play for $5 each b.) the total cost is a number of packages of gum times $0.30 c.) the volume of a rectangular box is the product of length, width, and height. i.e. The sum of h and seven i.e. p less than six i.e. the sum of two and the product of five and d i.e. T = total income n = number of tickets T = 5n i.e. T = total cost n = number of packages T = 0.30n i.e. V = volume l = length w = width h = height V = lwh
Simplify - put a numerical expression in its simplest form. Exponent - tells you how many times a number is multiplied by itself. Base - the number that is the factor. (the bottom #) Power - the combination of a base and exponent. Simplest form
exponent base POWER
Order of Operations 1.Work with whats in parentheses. 2.Simplify powers (exponents). 3. Multiply and divide in order from left to right. 4. Add and subtract in order from left to right. PEMDASPEMDAS lease xcuse y ear unt ally Parentheses Exponents Multiplication Division Addition Subtraction
Ex. 1 Simplify
Evaluate - substituting a given number for each variable and then using the order of operations to simplify. for a=7 and b=4. HELP!