2.1.1 Understanding algebraic notation and conventions

• Match the key term with its meaning:

  Variables ↔️ Letters representing unknown values

  Constants ↔️ Fixed numbers

  Operation Symbols ↔️ Mathematical actions

  Expressions ↔️ Phrases with numbers, variables, and operations
• What do variables represent in algebraic notation?

  Unknown values
• The symbol **+** is used to indicate addition in algebra.


  True
• The symbol ^ is used to indicate subtraction in algebraic expressions.


  False
• What operation does the symbol - represent in algebra?


  Subtraction
• Match the algebraic symbol with its meaning:

  + ↔️ Addition

  - ↔️ Subtraction

  × ↔️ Multiplication

  ÷ ↔️ Division
• In the equation x + 3 = 8, what is the value of x?

  5
• Arrange the steps of simplifying an expression with parentheses:

  1️⃣ Addition inside parentheses

  2️⃣ Multiplication after simplifying inside parentheses
• Parentheses tell you which calculations to do first in an algebraic expression.


  True
• Variables in algebra are represented by symbols such as x, y, and z.


  True
• What is a variable in mathematics?

  A letter for unknown values
• What is the mathematical symbol for exponents in PEMDAS?

  ^
• What is the final answer to the expression 2 × (3 + 4) – 5?

  9
• Match the expression with its simplified form:

  4 + 3 × 2 ↔️ 10

  (4 + 3) × 2 ↔️ 14
• Algebraic expressions can be solved to find a specific value.

  False
• What is the acronym used to remember the order of operations?

  PEMDAS
• Multiplication comes before division in PEMDAS.


  True
• Constants are fixed numbers in expressions.


  True
• Why are parentheses used in algebraic expressions?

  To change the order
• What is algebraic notation used for?

  Expressing mathematical ideas
• The expression **3x + 5** can be simplified but not solved to find a specific value.


  True
• What is the key difference between an algebraic expression and an algebraic equation?

  An equals sign
• Steps to solve 2 × (3 + 4) – 5 using PEMDAS

  1️⃣ Calculate inside the parentheses: (3 + 4) = 7

  2️⃣ Perform multiplication: 2 × 7 = 14

  3️⃣ Perform subtraction: 14 – 5 = 9
• Give an example of an operation symbol used in algebraic notation.

  ×
• Match the term with its example:

  Algebraic Expression ↔️ 3x + 5

  Algebraic Equation ↔️ 3x + 5 = 14
• An expression in algebraic notation includes numbers, variables, and operations.

  True