Add and subtract three or more integers

key notes:

Understanding Integers

• Integers: Integers are whole numbers that can be positive, negative, or zero.
• Positive Integers: Integers greater than zero, represented by numbers without a minus sign (e.g., 1, 2, 3).
• Negative Integers: Integers less than zero, represented by numbers with a minus sign (e.g., -1, -2, -3).
• Zero: The integer that is neither positive nor negative.

Order of Operations

• PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).  

Adding and Subtracting Three or More Integers

1. Group Integers with the Same Sign: If possible, group together integers that have the same sign.
2. Add or Subtract Within Groups: Add or subtract the integers within each group.
3. Combine Results: Combine the results from each group.

Examples:

• Adding: 3 + (-5) + 7
  • Group integers with the same sign: (3 + 7) + (-5)
  • Add within groups: 10 + (-5)
  • Combine results: 5
• Subtracting: 8 – 2 – (-4)
  • Rewrite subtraction as addition: 8 + (-2) + 4
  • Group integers with the same sign: (8 + 4) + (-2)
  • Add within groups: 12 + (-2)
  • Combine results: 10

Key Points to Remember:

• You can add or subtract integers in any order.
• Grouping integers with the same sign can make calculations easier.
• Always follow the order of operations (PEMDAS).
• Practice with different combinations of integers to improve your skills.

Learn with an example

Let’s practice!🖊️