Page 212 - NUMINO TG_2A
P. 212
13Minutes Unit

CMath Vo abulary elapsed time: the amount of time that passes from the start to the end of an activity

4 Jessica comes to school at 9 o’clock. She leaves at 2 o’clock. 4. Have students look at how the hour hand

How long does Jessica stay at school? moves while the minute hand rotates.

234 Guide students that it is better to use the hour

11 12 1 1 11 12 1 5 Count the spaces hand to find the elapsed time in hours.
10 2 10 2 between
93 2 numbers.
84 09 3 9:00 to 2:00 is Refer to .
5 hours.
765 84 What time did Jessica arrive at school?
765
9 : 00 A.M.
2 : 00 P.M. 9 o’clock.

Let’s make the minute hand rotate once.

Elapsed time: 5 hours How did the hour hand move? It moved from

9 to 10.

5 Draw the hour and minute hands correctly. How many hours passed after the minute

a hand rotated once? 1 hour.
11 12 1
10 2 Elapsed time: 2 hours 11 12 1 Let’s turn it one more time. What happened?
93 10 2
84 93 The hour hand moved from 10 to 11.
765 84
Let’s turn the minute hand till the hour hand
765
b 11 12 1 is at 2. How many times did the minute
10 2 11 12 1
93 Elapsed time : 6 hours 10 2 hand rotate? 5 times.
84 93
765 84 How much time has passed? 5 hours.

765 The hour hand moved from 9 to 2. How

many gradations did it move? 5.

c 11 12 1 Elapsed time : 4 hours 11 12 1 How can we find the elapsed time without
10 2 10 2
93 93 turning the minute hand? By counting the
84 84
765 number of gradations the hour hand moved.
765

d 11 12 1 Elapsed time : 7 hours 11 12 1 5. Have students draw the hour hand and the
10 2 10 2 minute hand to show the elapsed time. Have
93 93 them draw the minute hand longer than the
84 84 hour hand.
765
765

13. Minutes 121

Find the elapsed time.
Elapsed hours = The number of hour hand intervals

11 12 1 11 12 1 1 The hour hand intervals:
10 2 10 2 2 3 intervals = 3 hours
93 9 3
84 8 4

765 76 5

2 00 3

5 00

2A Unit 13 195
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