Changing weights

Changing weights

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 converting units between grams and kilograms.

Question 1Change answer

flour-sack-md.png glass-jar.png

a)  A container which weighs 300 grams is filled with 1100 grams of flour.
     What is the total weight of the filled container?  kilograms

Question 1Change answer

pear.png fruit-bowl.png
b)  A bowl which weighs 475 grams is filled with 2.025 kilograms of pears.
     What is the total weight of the full bowl and fruit?  kilograms

Question 1Change answer

cheese-wheel.png

c)  A wheel of cheese weighing 2.25 kilograms has 120 grams cut from it.
 
     How much does the block now weigh?  kilograms

Question 1Change answer

jar-of-peanuts.png
d)  A jar of peanuts weighs 1.25 kilograms. The jar weighs 450 grams. 
     What is the weight of the peanuts?    kilograms
Task administration: 
This task can be completed with pencil and paper or online (with auto marking displayed to students).
Level:
4
Curriculum info: 
Maths, Geometry and Measurement, Measurement
Keywords: 
weight, conversion of units, addition, subtraction, decimals
Description of task: 
Students convert units of weight - grams and kilograms - to answer questions a range of food items.
Curriculum Links: 
This resource can help to identify students' understanding of making simple conversions between units (Measurement) and additive strategies (Number strategies).
 
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Additive thinking, sets 7-8
Measurement sense, sets 6-7
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
  

Y8 (06/20000)

a)

1.4

moderate

b)

2.5

moderate

c)

2.13

difficult

d)

0.8

difficult
Diagnostic and formative information: 
 

Common error

Likely calculation

Likely reason

a)

b)

c)
 

d)

1400

477.025

117.75
122.25

448.75
451.25

1100 + 300

475 + 2.025

120 - 2.25
120 + 2.25

450 - 1.25
450 + 1.25

Does not convert grams into kilograms.