GCSE Maths (Edexcel)

435 videos | 33 hours

Estimating Powers

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Number Structure and Calculation

Estimating Powers

2:45 Advanced Indices & Roots
Spec N6
Previous Index Bracket Rule Next Fractional Indices
  • The power of a non-integer can be estimated by evaluating the powers of its nearest integers
  • To estimate, find the value of the nearest integers squared and place them on a number line
  • Estimate where the non-integer squared should go on the number line, closer to the lower integer
  • Use the number line to estimate the value of the non-integer squared
  • The estimate can be represented using the approximately equal to sign (~)
  • The actual answer may vary slightly from the estimate, but the method is still effective
  • This method is powerful and can be used to estimate square numbers

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.