Chapter 7 Decimals Worksheet - New Century Maths Page 23
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38f • 7 pens at $2.15 each
• 12 glue sticks at $1.99 each
• 4 erasers at $0.35 each
g • 2 tubes of toothpaste at $3.15 each
• 2 bottles of drink at $1.37 each
• 4 boxes of tissues at $3.29 each
• 1.5 kg of tomatoes at $2.65 per kilogram
h • 46.5 litres of petrol at 93.6 cents per litre
• 0.5 litres of premium oil at $6.60 per litre
2 Find as many words as you can beginning with ‘deci’, meaning ‘ten’.
Using technology
Calculating change
Spreadsheet
Your task is to solve all of the parts of Question 1 in Exercise 7-09 using a spreadsheet
7-04
similar to the one below.
Calculating
change
A
B
C
D
E
F
Item
Quantity
Price/Unit
Cost
6
7
Meat
1
$
25.36
8
Eggs
2
$
1.36
9
Apples
5.5
$
1.49
10
11
TOTAL:
12
13
Amount given:
$
50.00
14
CHANGE:
15
1 What formula will you use to calculate the cost?
2 What formula will you use to calculate the total?
3 What formula will you use to calculate the change?
Working mathematically
Applying strategies and reflecting: Multiplication maze
1 Can you work out how to get through the maze on the facing page? Start with 1 in
your calculator display and, as you travel along each path, multiply the number in
the display by the number you pass.
You may travel along each path only once, but it can be in any direction. You must
finish with a 5 in the display.
2 How many steps are needed to complete the maze?
3 Is there only one solution to this maze?
220
NEW CENTURY MATHS 7
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