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

9002 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the simultaneous equations x^2 + y^2 =13 and x= y - 5.


work out the area of a trapezium where the height is 4mm, the top length is 8mm and the bottom length is 12.5mm


Factorise x^2-x-6=0, and solve, finding the values of x


Using Pythagoras theorem to find side lengths of a triangle


We're here to help

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