1. Lesson 1 - Attachment A

2. Intro to Expressions Lesson 1 - Attachment A

6. Definitions Vocabulary word DefinitionExample Variablea letter or symbol that represents a number (unknown quantity). 8 + n = 12

7. Definitions Lesson 1 - Attachment A

8. Definitions Vocabulary word DefinitionExample Algebraic Expression a group of numbers, symbols, and variables that express an operation or a series of operations. m + 8 r - 3

9. Lesson 1 - Attachment A

10. Definitions VocabularyDefinitionExample Evaluate an algebraic expression to find the value of an algebraic expression by substituting numbers for variables. m + 8 m = 2 2 + 8 =10

11. Definitions Lesson 1 - Attachment A VocabularyDefinitionExample Simplify combine like terms and complete all operations m = 2 m + 8 + m 2m + 8 (2 x 2) + 8 4 + 8 12

12. Lesson 1 - Attachment A Sum More than Increased Plus Altogether

13. Lesson 1 - Attachment A Minus Decreased How many more Less Difference

14. Lesson 1 - Attachment A Triple Times of Double Product

15. Lesson 1 - Attachment A Divisor Into Dividend Quotient

16. Lesson 1 - Attachment A Write Algebraic Expressions for These Word Phrases Ten more than a number A number decreased by five 6 less than a number A number increased by eight The sum of a number and 9 Four times a number n + 10 w -5 x -6 n + 8 b + 9 4y

17. Lesson 1 - Attachment A Write Algebraic Expressions for These Word Phrases 9 more than a number The sum of a number and 6 A number b increased by 7 The quotient of 31 and a number A number decreased by 1 A number tripled x + 9 n + 6 b + 7 31 ÷ n k - 1 3s

18. Lesson 1 - Attachment A Algebraic Expression SubstituteAnswer x + 810 + 818 x + 4910 + 4959 x + x10 + 1020 7x7(10)70 40 ÷ x40 ÷ 104

19. You can write multiplication and division expressions without using the symbols  and . Instead of... You can write... x  3 x  3 35 ÷ y x(3) 3x3x 35 y When you are multiplying a number times a variable, the number is written first. Write “3x” not “x3.” Read 3x as “three x.” Writing Math

20. Lesson 1 - Attachment A

21. Word ProblemAlgebraic Expression Scott’s brother is 2 years younger than Scott. The sum of two numbers is 12. The difference between two numbers is 5.