Page 176 - SK Year 5 Mathematics DLP

3 The table below shows the age of herbal tea leaves in three packets
given by Encik Tan to his neighbour.

Colour of the packet Age of herbal tea leaves
Green 10.75 years
Red 9 months more than the green packet

Brown 5
6 year less than the green packet

Calculate the age, in years and months, of the herbal tea leaves in the:
a red packet. b brown packet.

Solution Draw a
9 months diagram.
The green packet 10.75 years
a
The red packet

10.75 years + 9 months = years months

3 year month
0.75 year = year
4 1 0 9
3 3 3 + 9
4 year = ( × 12) months 1 0 1 8
4
1 + 1 − 1 2
= 9 months
1 1 6
Therefore, 10.75 years = 10 years 9 months

10.75 years + 9 months = 11 years 6 months

The age of the herbal tea leaves in the red packet is 11 years 6 months.

5
b 10.75 years − year = years months
6
year month Explain how
2
5
5 year = ( × 12) months 9 2 1 you check
6 6 10 9 the answer.
1
= 10 months − 10
9 1 1

5
10.75 years − year = 9 years 11 months
6
The age of the herbal tea leaves in the brown packet is 9 years 11 months.

168 • Provide various problem-solving questions involving daily life situations.
4.4.1 Demonstrate various strategies for the solution.
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