Presentation on theme: "Objective The student will be able to:"— Presentation transcript:
1 Objective The student will be able to: translate verbal expressions into math expressions and vice versa.SOL: A.1Designed by Skip Tyler, Varina High School
2 What 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.
3 An algebraic expression contains: 1) one or more numbers or variables, and2) one or more arithmetic operations.Examples:x - 33 • 2n
4 In 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?
5 Division, on the other hand, is written as: 1)2) x ÷ 3
6 Throughout this year, you will hear many words that mean addition, subtraction, multiplication, and division. Complete the table with as many as you know.
7 Here 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.
8 Write 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
9 3) 11 less than 4 times a number. 4) two more than 6 times a number.6n + 25) the quotient of a number and 12.
10 Which of the following expressions represents 7 times a number decreased by 13? Answer Now
11 Which one of the following expressions represents 28 less than three times a number? Answer Now
12 Write 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?
13 Which 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
14 Which of the following expressions represents the sum of 16 and five times a number? Answer Now
15 When looking at the expression 103, 10 is called the baseand 3 is called theexponent or power.103 means 10 • 10 • 10103 = 1000
16 How 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
17 Which 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
18 Which of the following expressions represents four less than the cube of a number? Answer Now
19 We 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!!
20 Is 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!