POWERS, ROOTS & STANDARD FORM
POWERS
Square Numbers – A square number is obtained by multiplying a number by itself.
e.g. 52 = 5 x 5 = 25
Cubic Numbers – A cubic number is obtained by multiplying a number by itself twice.
e.g. 53 = 5 x 5 x 5 = 125
Powers – A power tells you the number of times you multiply the number together.
e.g. 24 = 2 x 2 x 2 x 2 = 16 (Multiple four 2s together)
e.g. 105 = 10 x 10 x 10 x 10 x 10 = 100000 (Multiple five 10s together)
ROOTS
Square Root – Square root is the reverse process of squaring.
e.g. If 32 = 9 then
=3
(square root take you back from the square number to the original value)
Cube Root – The cube root is the reverse process of cubing.
e.g. If 23 = 8 then
=2
STANDARD FORM or SCIENTIFIC NOTATION
Standard Form is a method for writing large or small numbers.
Numbers are written in the form a x 10n,
where a is a number between 1 and 10 and n is an integer.
e.g. 54 000 = 5.4 x 104
e.g. 0.000 0037 = 3.7 x 10-6
Powers, Roots & Standard Form Practice
http://www.bbc.co.uk/bitesize/ks3/maths/number/powers_roots/revision/1/
Learn about Powers & Roots. Try the activity and test.
http://www.cimt.plymouth.ac.uk/projects/mepres/book8/bk8i2/bk8_2i3.htm
http://www.cimt.plymouth.ac.uk/projects/mepres/book9/bk9i3/bk9_3i1.html
Learn about Powers and answer the questions.
http://www.cimt.plymouth.ac.uk/projects/mepres/book9/bk9i3/bk9_3i4.html
Learn about Standard Form and answer the questions.
www.supermathsworld.com Ask your teacher for login details.
Select Number from the options.
Select POWERS & ROOTS from the menu. Try the Easy, Medium and Hard levels.
Select STANDARD FORM from the menu. Try the Easy, Medium and Hard levels.