Numbers and Decimals

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Adding and Subtracting Negative Numbers

Numbers and Decimals Adding and Subtracting Negative Numbers

🎬 Video Tutorial

  • (0:01) Negative Numbers: Negative numbers have a minus sign; positive numbers don’t. Zero is neutral, meaning it’s neither positive nor negative.
  • (0:21) Adding or Subtracting on a Number Line: To add a positive number, move right. To subtract a positive number, move left.
  • (1:42) Simplifying Rules for Signs: Two of the same signs (e.g., minus-minus) become a plus. Opposite signs (e.g., plus-minus) become a minus.

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📂 Revision Cards

Number line showing negative and positive numbers from -5 to 5, with zero as neutral, labelled "Understanding Negative Numbers".
Number line visual for adding and subtracting negative numbers, showing (-7) + 5 = -2 with a move right and (-6) - 3 = -9 with a move left. ?
Rules for removing brackets in addition and subtraction: same signs become plus, different signs become minus.
Steps to remove brackets with multiple numbers, solving -12 - (-12 + 5) by solving inside first or applying the rule to change signs. Result is -5.

💬 ChatCat (AI Math Tutor)

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