Different weights

Different 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 weights.
1000 mg 
1000 g 
1000 kg 		 = 1 g
= 1 kg
= 1 tonne
Use this table to help you answer the following questions about potatoes and weight.

Question 2Change answer

 
RS1604_sack.png

a)  A sack of potatoes weighs 5 kilograms. 

     i)   How many grams in a 5 kilogram bag of potatoes?    grams
     ii)  How many 5 kg bags of potatoes would be needed to make 1 tonne?  

Question 2Change answer

RS1605_Truck old style.png
b)  A truck which weighs 5000 kilograms can carry 8 tonnes of potatoes.
     i)   How many kilograms of potatoes can the truck carry?   kilograms 

     ii)  How much does the truck weigh empty?   tonnes

Question 2Change answer

RS1603_potato.png
c) A potato weighs 435 grams. 
     Write this weight
     i)   in kilograms.
     ii)  in milligrams.
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, decimals
Description of task: 
Students convert units of weight - milligram, gram, kilogram, and tonne, in order to answer questions about potatoes.
Curriculum Links: 
This resource can help to identify students' understanding of making simple conversions between units (Measurement) and multiplicative strategies (Number strategies).
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Measurement sense, sets 6-7
Multiplicative thinking, sets 6-7
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 

 

Y8 (06/2000)

a)

i)
ii)

5000
200

easy
moderate

b)

i)
ii)

8000
5

moderate
moderate

c)

i)
ii)

0.435
435 000

moderate
difficult
Diagnostic and formative information: 
  

Common error

Likely calculation

Likely reason

a) i)
a) ii)

1000
1000

  

Number grams in 1 kg.
Number of kg in 1 tonne.

a) ii)
b) i)

5000
1600

5 × 1000
8000 ÷ 5

  

c) i)
c) ii)

435, 4350
4350, 43500

  

Get answer wrong by a factor of 10.