Page 184 - Math Genius C3

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(d) It takes about a .............. to tie your shoelaces.

(e) It takes about 5 .............. to cook noodles.

(f) You should sleep 8 .............. a day.

Between time (Before and after)

‘Tom and Jerry’ is Anju's favourite cartoon show.
12 1
11 12 1 She starts watching the show at 7:15 p.m. It is a 11 2
10 2 10
9 3 1 hour long show. When will it end? 9 3
8 4 8 5 4
7 6 5 The time after one hour is 7 6
7:15 p.m. + 1 hour = 8:15 p.m.

So, the show will end at 8:15 p.m.

Garima went shopping with her mother at 11:45 a.m. last Sunday. They woke up 3 hours
earlier. When did they wake up?
11 12 1
11 12 1 The time three hours earlier is 9 10 2 3
10 2 11:45 a.m. – 3 hours = 8:45 a.m.
9 3 8 7 5 4
8 4 So, they woke up at 8:45 a.m. 6
7 6 5
The amount of time from the starting time of an event to the finishing

(ending) time of the event is called the elapsed time.

For example: 11 12 1 11 12 1
10 2 Starting 10 2 Finishing
9 3 9 3
8 4 time of 8 4 time of
7 6 5 an event 7 6 5 the event

Elapsed time = 1 and half hour

Shweta started solving puzzles at 4:30 p.m. and finished at 6:55 p.m. How much time did
she spend solving puzzles?

11 12 1 11 12 1 11 12 1 11 12 1
10 2 1 h 10 2 1 h 10 2 25 min 10 2
9 3 9 3 9 3 9 3
8 4 8 4 8 4 8 4
7 6 5 7 6 5 7 6 5 7 6 5
4:30 p.m. 5:30 p.m. 6:30 p.m. 6:55 p.m.

She solved puzzles for 2 hours 25 minutes.

182 Mathematics-3