BIDMAS: Understanding Order of Operations

Introduction

• Presented by Katie from How To Become
• Focus: BIDMAS (Order of Operations in Maths)
• Encouragement to subscribe, like, comment, and share the video for more basic math videos

What is BIDMAS?

• BIDMAS stands for:
  • Brackets
  • Indices (powers, e.g., squared, cubed)
  • Division
  • Multiplication
  • Addition
  • Subtraction
• Method to use when working out calculations with more than one operation

Example Problems

Example 1

• Problem: 8 times 4 plus 3 times 9
• Possible Answers: 315 or 59
• Correct Answer: 59
• **Steps: **
  1. Calculate 8 times 4 = 32
  2. Calculate 3 times 9 = 27
  3. Add results: 32 + 27 = 59
  • Note: Calculators may not follow BIDMAS correctly without understanding.

Example 2

• Problem: 42 minus 3 times 7 plus 8
• Possible Answers: 281 or 13
• Correct Answer: 13
• **Steps: **
  1. Calculate 3 times 7 = 21
  2. Add 21 + 8 = 29
  3. Subtract 42 - 29 = 13

Example 3 (Trickier)

• Problem: (5 times 3) squared + 9 divided by 3
• Correct Answer: 228
• **Steps: **
  1. Calculate brackets: 5 times 3 = 15
  2. Calculate indices: 15 squared = 225
  3. Calculate divisions: 9 divided by 3 = 3
  4. Add results: 225 + 3 = 228

Example 4

• Problem: 12 - (15 divided by 3) squared
• Correct Answer: -13
• **Steps: **
  1. Calculate brackets: 15 divided by 3 = 5
  2. Calculate indices: 5 squared = 25
  3. Subtract: 12 - 25 = -13
  • Note: Result is negative due to order of operations.

Conclusion

• Reminder to practice BIDMAS for accuracy in multi-operation calculations
• Additional resources available for further practice
• Encouragement to leave suggestions for future videos and stay subscribed for updates