Fruit shop profit

Fruit shop profit

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about rounding and estimating. 
Mr and Mrs Richmon at their fruit store
Mr and Mrs Richmond own a fruit store.  Each month they both estimate their shop profits. 

Question 1Change answer

a)  i)  Complete Mr Richmond's table below to show each amount rounded to the nearest $100, then
     ii) Add up the rounded amounts and write in the total estimate.
Week Amount of takings Rounded amounts
1 $2,842 i) $  
2 $3,125 i) $ 
3 $3,633 i) $ 
4 $2,287 i) $ 
  Total ii) $ 

Question 1Change answer

b)  Write in the rounded amounts that Mrs Richmond used to get her $12,000 total in the table below.
Week Amount of takings Rounded amounts
1 $2,842 $ 
2 $3,125 $ 
3 $3,633 $ 
4 $2,287 $ 
5 Total $12,000

Question 1Change answer

c)  Explain why or when you would use rounding instead of exact calculations in some situations.
Task administration: 
This task is completed online and has some auto-marking displayed to students.
Level:
3
Curriculum info: 
Maths, Number and Algebra, Number Knowledge
Keywords: 
rounding, money, addition, estimation
Description of task: 
Using given information about a shop's takings students round the amounts to give estimated totals for four weeks takings.
Curriculum Links: 
Key competencies
This resource involves explaining why or when you they use rounding instead of exact calculations in some situations. This relates to the Key Competency: Using language, symbols and text.

For more information see http://nzcurriculum.tki.org.nz/Key-competencies

Learning Progression Frameworks
This resource can provide evidence of learning associated with
Additive thinking, sets 6-7
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 

Y6 (08/2002)
a)

i) 

 ii)

$2,800; $3,100; $3,600; $2,300

$11,800

2 marks - difficult

1 mark - moderate easy
b)   $3,000; $3,000; $4,000; $2,000 very difficult
c)  

Responses should include the idea that rounding will give a quick estimate, while calculating exact amounts is a longer process.NOTE: Students' responses will vary.

 very difficult