:Super Sale
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Approach: Independent  Level: Year 8
Focus:   Discount calculations  
Resources: Answer booklet 
364KB
Questions / instructions:
A shop is having a sale.
Write down how much is taken off the old price. Then write down the new sale price.
   
% responses
2005 ('01)
Y4
Y8
Example: 10% off
  
 
Savings: 20c
   
Sale price:
$1.80
   
     
1.
 
Savings:
45c or 45
 
39 (38)
Sale price ($4.05):
correctly calculated, given first answer
 
65 (75)
    
2.  
Savings:
$1.00 or 1.00
 
34 (35)
Sale price ($4.00):
correctly calculated, given first answer
 
67 (71)
     
3.
Savings:
$20.00 or 20.00
 
43 (46)
Sale price ($60.00):
correctly calculated, given first answer
 
59 (63)
     
4.
Savings:
$7.50 or 7.50
 
58 (57)
Sale price ($7.50):
correctly calculated, given first answer
 
69 (73)
     
5.
Savings:
$2 or 2.00
 
15 (14)
Sale price ($14.00):
correctly calculated, given first answer
 
36 (37)
     
 
Total score:   15
 
10 (11)
13–14
 
6 (5)
11–12
 
10 (14)
9–10
 
11 (12)
7–8
 
11 (10)
5–6
 
15 (13)
3–4
 
12 (13)
1–2
 
11 (13)
0
 
13 (11)

Commentary:
Students were less able to calculate a discount than subtracting the discount to get a discounted price. There was little change in performance from 2001 to 2005.
 
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