Concepts in Middle School Algebra

Communications

• What is a variable?
  - A variable in math is a symbol, usually a letter like x or y, that represents an unknown or changeable value.
  Examples of variables: x, y, n, k, a, A, b, B, i
• What is an algebraic term
• What is an expression
• What does it mean when a variable is attached to a number?
  - It means multiplication
  Examples: Algebra page 5

Expectations

• Be able to identify variables, terms, and expressions

Exercises

• What is an Term?
  A single number, variable, or a product of one or more numbers and variables
  Examples:
  5
  111
  x
  12A
  23K
  4AB
  110xy
• What is an Expression
  - A math sentence containing having two or more terms
  Examples:
  2k + 3
  -2k 1 3
  3x - 4y - 7
  5a - 2a + 1

Unit 1 test: page 9

• Know the timetable well
• Factors and multiples
• Prime numbers
• Divisibility rules

• Prime factor tree
• Prime factorization of a number
• Divisibility rules
• List the factors (divisors) of a number
• Find common factors of two or more numbers
• Find the GCF (Greatest Common Factor) of two or more numbers
• List some multiples of a number
• Find some common multiples of two or more numbers
• Find the LCM (Least Common Multiple) of two or more numbers