Page 147 - SK Year 5 Mathematics DLP

Centuries to years

1 The age of the first digital robot is The first digital robot
0.67 century in 2021. Convert was invented in 1954.
0.67 century to years.
0.67 century = years

Method 1 Method 2
Cara 2
Cara 1
67
0.67 century = (0.67 × 100) years 0.67 century = ( × 100) years
100
= 67 years = 67 years

0.67 century = 67 years

0.67 century is 67 years.

2 The following are some of the first digital devices invented and their
ages in 2021.

Digital camera Digital watch Digital calculator
0.45 century 1.01 centuries 0.5 century

Calculate the age of the above devices, in years,
by doing quick calculation.

0.1 century decade
Fill in the blanks.

years months

• Discuss the age, in years, of the first information technology
devices created for human convenience. 139
4.2.2 (vi)
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