Which bottle size?

Which bottle size?

Auto-markingPencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about working out the best price.

Question 1Change answer

range of different sized cola bottles
a)  How many bottles of each size would Alex have to buy if he needed 6 litres of cola, and how much would it cost?
 
 
Number needed for 6 L
Total Cost
  2 L $ 
  1.5 L $ 
  1 L $ 
  750 mL (0.75 L) $ 
 
b)  Alex decided he needed 12 litres of cola.
     Which size cola bottle would be the cheapest to buy? 
Task administration: 
This task is completed with pencil and paper or online with auto-marking.
Copyright: 
NZCER sketch
Level:
4
Curriculum info: 
Maths, Number and Algebra, Number Strategies
Keywords: 
addition, multiplication, decimals, money, rates
Description of task: 
Students calculate the number of different sized bottles of cola needed to make 6 litres and calculate the cheapest option to buy 12 litres
Curriculum Links: 
This resource can help to identify students' ability to apply additive or multiplicative strategies flexibly to whole numbers, ratios and equivalent fractions (including decimals and percentages) to solve simple rate problems.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Multiplicative thinking, sets 6-7
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
   

Y9 (11/1996)
2 marks
(1 mark for each 2 correct answers)		 a) i)
ii)
iii)
iv)		 3, $9.60
4, $8.80
6, $9.60
8, $8.00		 easy
1 mark b)     750 ml bottle easy