Index notation
The Maths Habit
Fold a sheet of paper in half 10 times. How many layers thick is it?
1024
- Index
- The small raised number. It tells you how many of the number are multiplied together.
- Index form
- A short way to write a number multiplied by itself.
Write in index form
5 × 5 × 5 × 5
Write as a multiplication
34
3 × 3 × 3 × 3
How many 3s?4Index form34Value81
3 × 3 = 9
9 × 3 = 27
27 × 3 = 81
2 × 2 × 2 × 2 × 2
How many 2s?5Index form25Value32
3 × 3 × 3 × 3
How many 3s?4Index form34Value81
3 × 3 = 9
9 × 3 = 27
27 × 3 = 81
10 × 10 × 10 × 10
How many 10s?4Index form104Value10 000
3 × 3 × 3 × 3
How many 3s?4Index form34Value81
3 × 3 = 9
9 × 3 = 27
27 × 3 = 81
6 × 6 × 6
How many 6s?3Index form63Value216
3 × 3 × 3 × 3
How many 3s?4Index form34Value81
3 × 3 = 9
9 × 3 = 27
27 × 3 = 81
7 × 7
How many 7s?2Index form72Value49
3 × 3 × 3 × 3
How many 3s?4Index form34Value81
3 × 3 = 9
9 × 3 = 27
27 × 3 = 81
2 × 2 × 2 × 2 × 2 × 2
How many 2s?6Index form26Value64
Which is bigger: 25 or 52?
25, because 32 is more than 25Write 81 in index form in two different ways.
92 and 34
Each fold doubles the layers. Write the number of layers after 10 folds in index form.
210 = 1024
Write 8 × 8 × 8 × 8 × 8 in index form.
85Work out the value of 43
64Write 1000 as a power of 10.
103
Exit tickets to print
