Different number system

Different number system

Auto-markingPencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Working with Students
Further Resources
This task is about using a different number system to work out numbers.
In the land of Ampast they use shapes to show their numbers.

purple-alien.png
 

The shapes    show 2 hundreds, 3 tens and 4 ones.
 
This is the number 234.
 

Question 2Change answer

a)           

 

Question 2Change answer

b)       

 

Question 2Change answer

c)                     

 

Question 2Change answer

d)                     

 

Question 2Change answer

e)                     
Task administration: 
This task can be completed with pencil and paper or online (with auto marking displayed to students).
Level:
2
Curriculum info: 
Maths, Number and Algebra, Number Knowledge
Keywords: 
place value
Description of task: 
Students demonstrate their understanding of place value by identifying numbers shown in a shape-based number system.
Answers/responses: 
    Y4 (06/99)
a)
b)
c)
d)
e)		 25
142
50
302
230		 easy
easy
moderate
moderate
difficult
Diagnostic and formative information: 
   Common error Likely reason
a)
b)
c)
d)
e)		 7
7
5
5
5		 Counts total number of objects (i.e., gives each a place value of 1).
a)&b)
c)
d)
e)		 correct, and
5, and
32, and
23		 Does not understand use of 0 as a place filler, e.g., 32 instead of 302.