Townsville CA 2008

Done on: 15 Sep 2010

Section C:
Q19) 1123 rubber bands

7406-668=6738

6738/6=1123

Q20) 135 marbles
180/4=45
marbles left = 45 x 3 = 135

Q21) $78.00
156/4=39
39 x 2 =78

Q22) 30
72/3 = 24
72-24-18 = 30

Q23) $1.00
5.65 x 4 =22.60
50-22.60 = 27.40
28.40 - 27.40 = 1.00

Q24) 8m
9.6/6 = 1.6
1.6 x 5 =8

Q25) 8 bears
if she buys 10 bears, she'll spend (10 x 10) + (3 x5) = 115
If she buys 9 bears, she'll spend (9 x 10) + (4 x 5) = 110
If she buys 8 bears, she'll spend (8 x 10) + (5 x 5) = 105

Q26) 10 years old
38-8 = 30
30/3 = 10

Remarks:

• Q20) 1 mark is deducted if you did not label the model "ming ming".
• For Q25, I deducted marks for those with only 1 line of working. There must be minimum 2 lines to show understanding; I also accepted other methods provided that you show understanding of the question.