Number

Question 1

What must be the same when applying an index law?

Answer 1

The base number / letter

Question 2

How do you multiply indicies?

Answer 2

• write out the number of indexes and add them together
  OR
• add the indexes together

Example:
2⁴ x 2³

2 x 2 x 2 x 2 x 2 x 2 x 2 = 2⁷

Question 3

How do you divide indicies?

Answer 3

• Write out the indexes and divide then cross out all the bottom row, the ones you crossed out cross on the top
  OR
• subtract the indexes

Example:
2⁷ ÷ 2³

2 x 2 x 2 x 2 x 2 x 2 x 2
———-‐—————————-
2 x 2 x 2

=

// x // x //

Question 4

How do you work out the indicies with brackets?

Answer 4

• Multiply the index

Example:
( 4² )³ = 4⁶