Page 170 - SK Year 5 Mathematics DLP

Centuries and decades

1
Calculate the age difference between

Age of the two banknotes.
banknotes
in 2021 1 century − 1 century = century
2 10
1 1 1 × 5 1
2 century – 10 century = 2 × 5 century – 10 century
SPECIMEN 5 1

=
10 century – 10 century
4 ÷ 2
= 10 ÷ 2 century
SPECIMEN 2

=
5 century
1 1 2
2 century − 10 century = 5 century

2
The age difference between the two banknotes is century.
5

3
2 7 centuries – 4 centuries 8 decades = centuries decades
5
Convert 1 century to 10 decades.
3 3 2 Then, add 10 decades and 6 decades
5
5 century = ( × 10) decades to make 16 decades.
1
= 6 decades century decade
Therefore, 6 16

Therefore, 3 7 6
7 centuries = 7 centuries 6 decades.
5 − 4 8
2 8

3
7 centuries – 4 centuries 8 decades = 2 centuries 8 decades
5

Complete this.

4
1 centuries – century = 12 decades
5

162 • Carry out subtraction activities involving centuries and decades
4.3.1 (v) using flash cards.
• Discuss the history and changes of banknotes in Malaysia.