Page 152 - SK Year 5 Mathematics DLP

2 Refer to the following table and Process Duration
calculate the total duration Preparation, 3.5 days
of the two processes for completing
a robotic car. installation, and
3.5 days + 1.5 days = days finishing of
non-metallic
1
3.5 days materials and
+1.5 days metallic materials
5.0 days Installation of the 1.5 days
3.5 days + 1.5 days = 5 days alarm system

The total duration of the two processes is 5 days.

3 4.75 days + 9 days 18 hours = days hours
day hour
4.75 days = 4 days + 0.75 day 1
4 18
= 4 days + (0.75 × 24) hours + 9 18
= 4 days + 18 hours 1 3 36

= 4 days 18 hours + 1 − 24
1 4 12

4.75 days + 9 days 18 hours = 14 days 12 hours

1
4 3 days + 8.125 days = days hours
2
1 1 8.125 days = 8 days + 0.125 day
3 days = 3 days + day = 8 days + (0.125 × 24) hours
2
2
1 12
= 3 days + ( × 24) hours = 8 days + 3 hours
2
1 = 8 days 3 hours
= 3 days + 12 hours
= 3 days 12 hours
day hour
3 1 2
+ 8 3
1 1 1 5
1
3 days + 8.125 days = 11 days 15 hours
2

144 4.3.1 (ii) 1
4.3.2 (ii) • Carry out mental arithmetic activities, such as day is 12 hours,
2
0.5 day is 12 hours, and 0.25 day is 6 hours.