Writing Standard Form Numbers as Ordinary Numbers
• Introduction

In this worksheet, you must change numbers written in standard form back to ordinary numbers.

Remember       10000 = 104
1000 = 103
100 = 102
10 = 101
1 = 100

 1 10
= 10-1  or
 1 10

 1 100
= 10-2  or
 1 102

 1 1000
= 10-3  or
 1 103

Examples

5.1 × 10as an ordinary number is

5.1 × 10000 = 51000

3.214 × 10 -4 as an ordinary number is

3.214 ×
 1 1000
= 3.214 ÷ 10000 = 0.0003214

• Question 1

Write this standard form number as an ordinary number:

 9.54 × 10-2 =
• Question 2

Write this standard form number as an ordinary number:

 5.37 × 10-3 =

• Question 3

Write this standard form number as an ordinary number:

 5.79 × 10-2 =

• Question 4

Write this standard form number as an ordinary number:

 5.31 × 103 =

• Question 5

Write this standard form number as an ordinary number:

 7.03 × 102 =

• Question 6

Write this standard form number as an ordinary number:

 5.63 × 10-4 =

• Question 7

Write this standard form number as an ordinary number:

 1 × 10-2 =

• Question 8

Write this standard form number as an ordinary number:

 3.18 × 102 =

• Question 9

Write this standard form number as an ordinary number:

 6.47 × 101 =

• Question 10