Different number system II

Different number system II

Pencil and paper
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
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Further Resources
This task is about using a different number system to work out numbers.
planet Efilar
 
On the planet Efilar they have their own symbols for numbers.
 

10,000

1,000

100

10

1
 

a)
Write each of these Efilar numbers in our number system.
 
  i)
set of Efilar symbols
 
Number: ______________
 
  ii)
set of Efilar symbols
 
Number: ______________
 
b)
Show each of these numbers in the Efilar system.
 
  i) 2,316

 
 
 
  ii) 30,050

 
 
 
Task administration: 
This task is completed with pencil and paper only.
Level:
3
Curriculum info: 
Maths, Number and Algebra, Number Knowledge
Keywords: 
place value, whole numbers
Description of task: 
Using information about the shape-based number system on planet Efilar, students display the base 10 numbers for Efilar shapes. Students also display Efilar shapes from given base 10 numbers.
Answers/responses: 
   

Y6 (10/1999)

a)

i)
ii)

2,145
13,000

easy
moderate

b)

i)


ii)

easy


easy

 

Diagnostic and formative information: 
 

Common error

Likely reason

b) ii)

Shows 30,500 or 30,005

Place value error.