Presentation on theme: "Objective The student will be able to:"— Presentation transcript:
1Objective The student will be able to: translate verbal expressions into math expressions and vice versa.SOL: A.1Designed by Skip Tyler, Varina High School
2What is the area of a rectangle? Length times WidthIf the length is 3 meters and the width is 2 meters, what is the area?A = L x W A = 3 x 2 = 6 meters2A, L and W are the variables. It is any letter that represents an unknown number.
3An algebraic expression contains: 1) one or more numbers or variables, and2) one or more arithmetic operations.Examples:x - 33 • 2n
4In expressions, there are many different ways to write multiplication. 1) ab2) a • b3) a(b) or (a)b4) (a)(b)5) a x bWe are not going to use the multiplication symbol any more. Why?
5Division, on the other hand, is written as: 1)2) x ÷ 3
6Throughout this year, you will hear many words that mean addition, subtraction, multiplication, and division. Complete the table with as many as you know.
7Here are some phrases you may have listed. The terms with Here are some phrases you may have listed. The terms with * are ones that are often used.
8Write an algebraic expression for 1) m increased by 5. 2) 7 times the product of x and t.7xt or 7(x)(t) or 7 • x • t
93) 11 less than 4 times a number. 4) two more than 6 times a number.6n + 25) the quotient of a number and 12.
10Which of the following expressions represents 7 times a number decreased by 13? Answer Now
11Which one of the following expressions represents 28 less than three times a number? Answer Now
12Write a verbal expression for: 1) 8 + a. The sum of 8 and a2)The ratio of m to rDo you have a different way of writing these?
13Which of the following verbal expressions represents 2x + 9? 9 increased by twice a numbera number increased by ninetwice a number decreased by 99 less than twice a numberAnswer Now
14Which of the following expressions represents the sum of 16 and five times a number? Answer Now
15When looking at the expression 103, 10 is called the baseand 3 is called theexponent or power.103 means 10 • 10 • 10103 = 1000
16How is it said? 21 Two to the first power 22 Two to the second power or two squared23Two to the third power or two cubed2n7Two times n to the seventh power
17Which of the following verbal expressions represents x2 + 2x? the sum of a number squared and twice a numberthe sum of a number and twice the numbertwice a number less than the number squaredthe sum of a number and twice the number squaredAnswer Now
18Which of the following expressions represents four less than the cube of a number? Answer Now
19We can’t evaluate because we don’t know what n equals to!! 2222 • 2 = 4232 • 2 • 2 = 82n7We can’t evaluate because we don’t know what n equals to!!
20Is 35 the same as 53? Evaluate each and find out! 35 = 3 • 3 • 3 • 3 • 3 = 24353 = 5 • 5 • 5 = 125243 ≠ 125They are not the same!