Remember that: 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' .

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

## Indices

## What is an index Number?

Remember that:

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' .

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