Page 149 - SK Year 5 Mathematics DLP

ADDITION OF TIME

1 5
Hours and minutes P 3 hour Q 1 hours S
6

1 The time taken to travel 50 minutes
between two towns is shown R
in the diagram.

a Calculate the total time taken to travel from town P to town S.

1 5
3 hour + 1 hours = hours
6
Before doing addition,
1 5 1 × 2 5 get the common
6
3 hour + 1 hours = 3 × 2 hour + 1 hours denominator first.
6
2 5
= hour + 1 hours
6 6
2 5
= hour + 1 hour + hour
6 6
7
= 1 hour + hours
6
1
= 1 hour + 1 hours
6
1
= 2 hours
6
1 5 1
3 hour + 1 hours = 2 hours
6
6
1
The total time taken to travel from town P to town S is 2 hours.
6
b Calculate the total time taken to travel, in minutes, from town P
to town R.

1
3 hour + 50 minutes = minutes
Is 70 minutes equal
1 1 20 2 0 minutes to 1 hour 10 minutes?
3 hour = ( × 60) minutes + 5 0 minutes Discuss.
3
1
= 20 minutes 7 0 minutes
1
3 hour + 50 minutes = 70 minutes
The total time taken to travel from
town P to town R is 70 minutes.

• Guide pupils to calculate the duration of time based on their 141
4.3.1 (i) experience such as during holidays or going back to their
hometown.