Coin trail

Coin trail

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Further Resources
This task is about different ways of measuring length.

coin-trail-children.png

The students at Springfield School made a coin trail using just 20 cent coins to raise money for Daffodil Day.

Question 1Change answer

a)
The length of the 20 cent coin trail was 21,000 mm.
 stack of coins
  i)
Change this measurement to cm.  centimetres
  ii)
Change your answer for i) to metres.  metres

Question 1Change answer

b)
The 20 cent coins would form a pile 1,500 mm high.

daffodil.png
  i)
Change this measurement to cm.  centimetres
  ii)
Change your answer for i) to metres.  metres
Level:
3
Curriculum info: 
Maths, Geometry and Measurement, Measurement
Keywords: 
length, conversion of units
Description of task: 
Students calculate and record the length and height of coins in centimetres and metres.
Curriculum Links: 
This resource can help to identify students' understanding of converting between standard units of measurement for length for the Measurement objectives.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Measurement sense, set 5
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 

Y6 (11/2002)
a) i)
ii)		 2 100 cm
21 metres [Accept a)i) divided by 100]		 difficult
moderate
b) i)
ii)		 150 cm
1.5 metres [Accept b)i) divided by 100]		 moderate
difficult

  

Diagnostic and formative information: 

 

 Common error

Likely calculation

Likely misconception

a) i)
b) i)

210
15

21,000 ÷ 100
1,500 ÷ 100

Assumes there are 100 mm in 1 cm.

a) i)
b) i)

21
1.5

21,000 ÷ 1 000
1,500 ÷ 1 000

Assumes there are 1000 mm in 1 cm.

a) ii)
b) ii)

210 (or various)
15 (or various)

Answer to a) i) ÷ 10
Answer to b) i) ÷ 10

Assumes there are 10 cm in 1 metre.