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TIME

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**Types of Clocks digital clock analog clock Hours Minutes Hours Minutes**

7 : 15 Hours Minutes Hours Minutes

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**12 hour system 1.20pm 7.45am 12.30pm 10.10am 2.15pm 12.00am**

a.m– the time after midnight before noon p.m– the time after noon before midnight

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a.m p.m Midnight Noon Midnight a.m p.m 12.00 a.m 12.00 p.m 12.00 a.m

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24 hour system 0000 hrs 1520 hrs 0200 hrs 1700 hrs 1215 hrs 2345 hrs

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TIME SYSTEM 12 hour system 24 hour system 0000 hrs 1.20pm 12.30pm 0200 hrs 10.10am 1215 hrs 12.00am 2345 hrs

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**24 hour system 0000 hrs 0100 hrs 0200 hrs 0300 hrs 0400 hrs 0700 hrs**

zero hundred hours 0100 hrs zero one hundred hours 0200 hrs zero two hundred hours 0300 hrs zero three hundred hours 0400 hrs zero four hundred hours 0700 hrs zero seven hundred hours

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**24 hour system 1000 hrs 1100 hrs 1200 hrs 1300 hrs 2000 hrs 2300 hrs**

ten hundred hours 1100 hrs eleven hundred hours 1200 hrs twelve hundred hours 1300 hrs thirteen hundred hours 2000 hrs twenty hundred hours 2300 hrs twenty-three hundred hours

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**How to read time in 24-hour system?**

0205 hrs Zero two five hours

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**How to read time in 24-hour system?**

0700 hrs Zero seven hundred hours

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**How to read time in 24-hour system?**

1645 hrs sixteen forty-five hours

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**Write the time in words. 0000 hrs 0010 hrs 0035 hrs 0100 hrs 0300 hrs**

Zero hundred hours 0010 hrs Zero Ten hours 0035 hrs Zero Thirty-five hours 0100 hrs Zero One hundred hours 0300 hrs Zero Three hundred hours 0435 hrs Zero four thirty-five hours

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**1515 hrs 1900 hrs 2110 hrs Twenty-one Ten hours 2335 hrs**

Fifteen fifteen hours 1900 hrs Nineteen hundred hours 2110 hrs Twenty-one Ten hours 2335 hrs Twenty three Thirty-five hours

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**Write the time in numerals.**

0115 hrs zero one fifteen hours = twenty twenty hours = 2020 hrs 1700 hrs seventeen hundred hours =

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Textbook Let’s practise page 115 1,2,3,4,5

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**RELATE and CONVERT TIME**

a. Convert the 24-hour system to 12-hour system b. Convert the 12-hour system to 24-hour system

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Noon Midnight 12.00 p.m 1.00 p.m 2.00 p.m 3.00 p.m 4.00 p.m 1.00 a.m 2.00 a.m 3.00 a.m 4.00 a.m 5.00 a.m 6.00 a.m 7.00 a.m 8.00 a.m 9.00 a.m 10.00 a.m 11.00 a.m 12.00 0000 hrs 0100 hrs 0200 hrs 0300 hrs 0400 hrs 0500 hrs 0600 hrs 0700 hrs 0800 hrs 0900 hrs 1000 hrs 1100 hrs 1200 hrs 1300 hrs 1400 hrs 1500 hrs 1600 hrs

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12.00 a.m 12.59 p.m 1.00 p.m 0000 hrs 1259 hrs 1300 hrs

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**24 hour system 12 hour system 0000 hrs 12.00 a.m 1259 hrs 12.59 p.m**

- 12 + 12 2359 hrs 11.59 p.m

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**Convert time in 24-hour system 12-hour system**

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24 hour system 12 hour system 1259 noon 12.59pm 1300 hrs 1.00pm - 1200 hrs 4.25pm - 1200 425

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**Convert time in 12-hour system 24-hour system**

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24 hour system 12 hour system 1259 noon 12.59pm 1300 hrs 1.00pm + 12 1300 9.35pm 2135 hrs + 12 2135

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24 hour system Identify a.m or p.m a.m 0005 hrs = a.m 1001 hrs = p.m 1320 hrs = 2301 hrs = p.m 0009 hrs = a.m p.m 1240 hrs =

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Convert the time to 12-hour system. 0005 hrs = 12.05 a.m 1001 hrs = 10.01 a.m 1320 hrs = 1.20 p.m 2301 hrs = 11.01 p.m 0009 hrs = 12.09 a.m 1240 hrs = 12.40 p.m

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**A.Convert the following time to the 12-hour system.**

0000 hrs = 12.00 a.m. 0009 hrs = 12.09 a.m. 0105 hrs = 1.05 a.m. 0720 hrs = 7.20 a.m. 1001 hrs = 10.01 a.m.

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1240 hrs = 12.40 p.m. 1309 hrs = 1.09 p.m. 1415 hrs = 12.15 p.m. 1728 hrs = 5.28 p.m. 11.01 p.m. 2301 hrs =

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**B.Convert the following time to the 24-hour system.**

12.05 a.m. = 0005 hrs 3.15 a.m. = 0315 hrs 9.30 a.m. = 0930 hrs 12.20 p.m. = 1220 hrs 2.01 p.m. = 1401 hrs

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9.15 a.m. = 0915 hrs 11.39 a.m. = 1139 hrs 12.35 p.m. = 1235 hrs 1.40 p.m. = 1340 hrs 7.55 p.m. = 1955 hrs

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Textbook Let’s practise page 118 1,2,3,4

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**RELATIONSHIP BETWEEN UNITS of TIME**

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1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds

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**1 hour = 60 minutes hour = 30 minutes hour = 15 minutes hour =**

2 hour = 30 minutes 1 4 hour = 15 minutes 3 4 hour = 45 minutes

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1 2 hour = 30 minutes

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1 4 hour = 15 minutes

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3 4 hour = 45 minutes

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1 5 1 5 hour = x 1 hour 1 5 x 60 minutes = 12 minutes

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2 5 1 5 hour = x 60 minutes = 24 minutes

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1 2 day = 12 hours

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