Indices

What is an index Number?


Remember that:
Screen_shot_2011-03-10_at_1.09.45_PM.png
This is read '4 to the power 5'. The number 4 is called the base and is the factor that is repeated in the multiplication. The small raised number 5 is called the power or index. The following is read as '2 to the power 4' .
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We can use index notation to write repeated multiplication in a shorter way.

ACTIVITY - have a go at using index notation by doing to following in your books

1 Try to write the following in index form:

a. 8 x 8 x 8 x 8 x 8
b. 1 x 1 x 1 x 1 x 1 x 1 x 1
c. 27 x 27 x 27 x 27
d. 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9
e. 6 x 6 x 3 x 3 x 3
f. 7 x 7 x 7 x 3 x 3 x 2 x 2 x 2 x 2

2. Write in expanded form