Year 9 Maths Revision Notes

Notes

21:32 = Gemini Flash-Lite ... or more numbers (often found using prime factor trees or Venn diagrams). image.png ○ Lowest Common Multiple (LCM): The smallest positive multiple that is shared by two or more numbers. image.png ### 8. Standard Form ○ Used to write very large or very small numbers compactly. image.png ○ Written in the format: $A \times 10^n$ image.png ○ Rule: $1 \le A < 10$ and $n$ is an integer. image.png ○ Example (Large): $4,500,000 = 4.5 \times 10^6$ image.png ○ Example (Small): $0.00032 = 3.2 \times 10^{-4}$ image.png Would you like to practice some questions or dive deeper into any specific topic from this list? ☐ ⚠️ ⏻ 🔌 📞 ... Gemini is AI and can make mistakes, including about people. Your privacy and Gemini + Ask Gemini  21:31 = Gemini Flash-Lite arithmetic, percentages, ratios, and proportion. image.png ○ Always identify what the question is asking for, define your variables, and break multi-step problems into smaller parts. image.png ### 4. Money Problems ○ Percentages: Used for calculating discounts, tax, VAT, and simple/compound interest. image.png ○ Unit Pricing: Finding the cost per single item or unit to compare best buys. imag...