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Indices without a calculator

hey there,
just needing help/advice on how to do indices without a calculator. i understand the concept all the the rules of indices but still struggle to do it in my head especially when the "power of" is a fraction.

if anyone knows of any videos, notes ect that could help thank you.
Reply 1
Negative and Fractional Indices (Higher Only) | GCSE Maths Tutor: https://www.youtube.com/watch?v=Nfa9LxBzFr0&t=21s

I hope this helps

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