:Apples
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Approach: One to one Level: Year 4 and year 8
Focus: Money calculations and change.
Resources: Advertisement card, calculator,$5, $10 and $20 notes.
364KB

Apples
$1.95 a kilograms

Questions/instructions:

The calculator is not given to the student until question 4.

Questions leading up to Q4 are solved mentally.


In this activity we are using some artificial money.

Apples at a shop cost $1.95 a kilogram.

Show the advertisement card and hand out money.

% responses
2001 ('97)
y4
y8
I want to buy 5 kilograms of apples.I have a $5 note, a $10 note and a $20 note.

1. What is the smallest value note that I could use to pay for the apples?
$10
47 (39)
86 (92)
2. Why did you choose that note?
calculation
2 (1)
11 (3)
estimation and elimination
27 (14)
46 (49)
estimation, but not eliminating $20 option
18 (17)
28 (31)
3. How much change would you expect?
25¢
7 (8)
33 (35)
Hand student a calculator.

Use the calculator to work out the next problem. Tell me what you are doing with the calculator as you do it.
   
Year 8

4. If I bought a 5 kilogram bag of apples on special for $7.50, how much would the apples cost per kilogram?

Ask the student to read out the answer shown on the calculator.
$1.50
57 (70)
Year 4

4. If apples cost $1.50 a kilogram, how much would five kilograms cost?

Ask the student to read out the answer shown on the calculator.
$7.50
26 (24)
Commentary
Although most year 8 students realised that a $10 note would be sufficient in question 1, few realised that the total amount required would be 5x5 cents less than $10, making the answer to question 3 easy.
 
Chapter Graphic
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