Presentation Transcript
Slide 1:Lesson 1: Expressions
Slide 2:variable – a letter that is used to represent one or more numbers.
algebraic expression – an expression that is made of numbers, variables and operation symbols.
EX 5(n) 5·n 5n
6 + c
8 - x five times n 6 plus c 8 minus x
Slide 3:power - an expression that represents repeated multiplication of the same factor.
34 = 3 ∙ 3 ∙ 3 ∙ 3 seven to the first power five to the second power
or
five squared two to the third power
or
two cubed 5 ∙ 5
25 2 ∙ 2 ∙ 2
8 7
Slide 4:Writing Algebraic Expressions
Addition
Subtraction • sum
• plus
• total
• more than
• increased by • difference
• less than
• minus
• decreased by
Slide 5:Multiplication
Division • times
• product
• multiplied by
• of • quotient
• divided by
• divided into
Slide 6:EX Write an expression.
a. eight more than a number n
b. The difference of a number x and 6 n + 8 x - 6
Slide 7:A number y minus 5
d. 12 times a number b y - 5 12b
12(b)
Slide 8:e. 1/3 of a number x
f. The quotient of a number k and 2 k ÷ 2
Slide 9:The words “the quantity” mean to group.
EX Write an expression.
a. 4 less than the quantity 6 times a number n 6n - 4
Slide 10:b. 3 times the sum of 7 and a number y
c. The difference of 22 and the square of a number m 3(7 + y)