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E:\Working\Focus_Learning\Math_Genius_4_(25-10-2023)\Open_Files\Chap-12
\\December 6, 2023 11:48 AM Bharat Arora P-5 Reader _________________________ Date: ___________________

Encapsulate
math
tiMe

time in Minutes time in Seconds

example: 7:27 a.m.
11 12 1 11 12 1 11 12 1 11 12 1
60 10 2 10 2 10 2 10 2
55 5 9 3 10 seconds 9 3 20 seconds 9 3 30 seconds 9 3
50 11 12 1 10 8 4 later 8 4 later 8 4 later 8 4
10 2 7 6 5 7 6 5 7 6 5 7 6 5
45 9 3 15
8 4 7:20:00 7:20:10 7:20:30 7:21:00
40 7 6 5 20 7 hours 20 minutes 7 hours 20 minutes 7 hours 20 minutes 7 hours 21 minutes
and 0 seconds and 10 seconds and 30 seconds and 0 seconds
35 25
30
Conversion of 24-hour Format to Conversion of Units of time
12-hour Format
2526 27282930
24-Hour Clock Hours into minutes:
examples Example: 4 hours = 4 × 60 minutes
2400 hours
or = 240 minutes
0000 hours 00:44 hours 12:44 a.m.
2300 hours 0100 hours Minutes into seconds:
2200 hours 12 1 0200 hours 00:55 hours 12:55 a.m.
11
2100 hours 10 midnight 2 0300 hours Example: 8 minutes = 8 × 60 seconds
9 3
2000 hours 8 4 0400 hours 01:15 hours 1:15 a.m. = 480 seconds
1900 hours 7 5 0500 hours 08:50 hours 8:50 a.m. Seconds into minutes:
1800 hours 6 p.m. a.m. 6 0600 hours 10:25 hours 10:25 a.m. Example: 480 seconds ÷ 60
= 8 minutes

1700 hours 5 7 0700 hours 12:12 hours 12:12 p.m.
4 8 12:48 hours 12:48 p.m. Minutes into hours:
1600 hours 0800 hours
3 9 Example: 540 minutes ÷ 60
1500 hours 2 noon 10 0900 hours 13:28 hours 1:28 p.m. = 9 hours
1400 hours 1 12 11 1000 hours 16:49 hours 4:49 p.m.
1300 hours 1100 hours
1200 hours 22:17 hours 10:17 p.m.
Addition and Subtraction of time Calender
example: Add: min s
28 minutes 32 2024 CALENDAR
seconds and 1 JANUARY FEBRUARY MARCH APRIL
24 minutes 42 28 32
seconds. + 24 42

53 14
h min MAY JUNE JULY AUGUST

example: Subtract 5 74
4 hours 44 minutes 6 14
from 6 hours 14 SEPTEMBER OCTOBER NOVEMBER DECEMBER
minutes: – 4 44
1 30

time duration:
Conversion of years, Months, Weeks and days:
Starting reaching duration example: 3 years 7 months = 3 years + 7 months = 3 × 12 months + 7 months
time time = 36 months + 7 months = 43 months.
7:15 a.m. 7:45 a.m. 30 minutes Calculating days:
example: Number of days between 20th January and 28th February.
= 11 + 28 = 39 days.

226 Mathematics-4