Page 334 - Math Smart - 7

d) Draw a timeline from 11 45 to 22 05.
1 60
7 7

-1145
10 20
11 45 21 45 22 05

The time duration from 11 45 to 22 05 is 10 h 20 min.

Check My
Understanding

Calculate the time intervals.
a) 09 49 to 11 15

b) 6.52 a.m. to 00 00
c) 10.54 a.m. to 5.15 p.m.
o A train left station A at 08 49 and arrived at station B at 11 13. How long
was the train ride?
e The school day starts at 7.30 a.m. and ends at 3.40 p.m. How long is the
school day?
o The time in Singapore is 8 hours ahead of London.
When it is 10 15 in London, what is the time in Singapore?

e Jane takes 30 min to walk to work from home. She has to leave home
at 7.20 a.m. to get to work on time. It takes Jane 1 of that time If she
drives to work, if Jane drives to work, what is the latest time she can
leave home to arrive at work on time? Write your answer in the 24-hour
notation.

o Journal Writing

Lexy wants to calculate the duration
from 12.57 p.m. to 16.05 p.m. She
uses her calculator to subtract the
start time from the end time as
shown.

Lexy writes the answer as 3 h 48 min.
a) Explain why her calculation is
not correct,
b) Work out the correct answer.

UNIT 15 Measuring Time, Area, Perimeter and Volume
I