Work out the value of 5^3-5^2:

The first step would be to consider each of the powers individually, work out their value and then proceed with the subtraction to end up with a result. Firstly, as this question is to be done without a calculator, we will remind the principle behind the powers. Say for 5 to the power 3 it is equivalent to writting 5 x 5 x 5. This is also the case for 5 squared i.e. 5 x 5. We would then proceed to work out 5x5 which is 25 and the value for 5 squared and then multiply 25 by 5 once more to obtain 5 cubed which is 125. Now that the hard part is done we simply subtract 25 from 125 (125-25) which gives the final value of 100.

Answered by Alexander B. Maths tutor

8763 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A metal Sphere of radius Ym is melted down and remade into a cylinder of the same volume with height Ym with circular ends of radius 3m, find Y


Draw the following inequality on a graph: x^2+4x+1<-2


Starting with x^2+2x+1=0 use the method of factorising to solve for x.


The diameter of a ring is 19mm. Calculate the area of the ring in cm^2, giving the area to 3 significant figures.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences