Page 141 - Start Up Mathematics_4

• The time from 12 midnight to 12 noon is expressed Remember
as a.m. Here a.m. means ante meridiem or before
midday. We do not write a.m. or
p.m. with 12 o’clock. We
• The time from 12 noon to 12 midnight is expressed as simply write 12 noon or
p.m. Here p.m. means post meridiem or after midday. 12 midnight.
Let’s understand it this way.

1 day = 24 hours

= 12 hours + 12 hours
first half second half

(a.m.) (p.m.)
Look at the given examples.

1. Chinky goes to school at 7 o’clock in the morning.

This can be written as, Chinky goes to school at 7 a.m.
2. Raju had his lunch at 1:30 in the afternoon.

This can be written as, Raju had his lunch at 1:30 p.m.

EXERCISE 10.2

1. Write the time in a.m. or p.m.
(a) 4:25 in the evening __________________
(b) 8 o’clock in the morning __________________

(c) 9:50 at night __________________
(d) quarter to 6 in the morning __________________

(e) half past 11 before noon __________________
(f) quarter past 7 at night __________________

2. Match the columns.

Column A Column B

(a) Sneha has her lunch (i) 5:00 p.m.

(b) Vini goes for morning walk (ii) 7:30 a.m.

(c) Manav goes to school (iii) 9:00 p.m.

(d) Mr Gupta and his friends go for dinner (iv) 2:15 p.m.

(e) Renu has evening tea (v) 6:00 a.m.

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