G S Rehill's Interactive Maths Software Series - "Building a Strong Foundation in Mathematics" from mathsteacher.com.au.

 

Year 7 Interactive Maths - Second Edition


Expanded Form

If a number is written as a product of factors, then it is said to be in expanded form.

10 squared in expanded form


Example 5

Write 132 in expanded form.

Solution:

13 squared in expanded form


Example 6

Write all prime numbers between 32 and 52.

Solution:

3 squared and 5 squared

The prime numbers between 9 and 25 are 11, 13, 17, 19 and 23.


Example 7

Calculate 72 + 82.

Solution:

7 squared + 8 squared = 113


Key Terms

expanded form

 

Study Another Topic in Chapter 2: Powers and Roots

[ Patterns ] [ Expanded Form ] [ Square Roots ] [ Using a Graphics Calculator ] [ Powers ] [ Ascending Order ] [ Writing Numbers in Index Form ] [ Powers of 10 ] [ Standard Form (Scientific Notation) ] [ Problem Solving Unit ] [ Symbols ] [ Index ]

 
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