Cans of fruit drink

Cans of fruit drink

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Working with Students
Further Resources
This task is about working out costs.
stack-of-cans.png

Use the diagram of the stack of cans to help answer the following questions.

Question 2Change answer

a)  How much would 4 cans cost?  

Question 2Change answer

b)  How much would 10 cans cost? 

Question 2Change answer

c) What is the largest number of these cans that could be bought for $5?

Question 2Change answer

d)  If 15 cans were bought, what would be left over from $20?  
Task administration: 
This task can be completed with pencil and paper or online (with SOME auto marking).
Level:
3
Curriculum info: 
Maths, Number and Algebra, Number Strategies
Keywords: 
subtraction, multiplication, decimals, money
Description of task: 
Students calculate the cost of several cans of soft drinks, the maximum number bought for a given cost, and the change given after buying several cans.
Curriculum Links: 
This resource can help to identify students' ability to apply additive or simple multiplicative ideas flexibly to combine or partition whole numbers to solve multiplication and division problems.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Multiplicative thinking, sets 4-5
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 

Y6 (06/1997)

Y7 (06/1997)
a) $3.00 easy easy
b) $7.50 moderate easy
c) 6 difficult easy
d) $8.75 difficult moderate
Diagnostic and formative information: 
   Common error Likely calculation Likely reason
a) 5 [or $3.75]     One can short.
d) $5
$11.25		 $20 - 15 cans
15 × .75		 Subtracts inappropriately.
Cost of 15 cans rather than change.