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MG 1.5
Determine7HOODQGZULWHWLPHWRWKHQHDUHVWPLQXWHDQGPHDVXUHWLPH
the duration of time intervals in hours
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(e.g., 11:00 a.m. to 4:00 p.m.).
LQWHUYDOVLQPLQXWHVHJE\UHSUHVHQWLQJWKHSUREOHPRQDQXPEHUOLQHGLDJUDP
UNDERLYING SKILLS AND CONCEPTS:
tell time;
counting
Find Elapsed Time
You can tell how long
something took to do.
a
K
ey Ide
11
12
6
5
1
10
9
8
2
3
7
4
How long it takes is elapsed time.
E x am p l E
1
Zack started playing at
11
12
Zack stopped playing at
1
11
2
10
9
6
2
9
4
7
1
10
3
8
12
3
4
8
5
7
5
6
B – © CSL Associates, Inc. All rights reserved.
How long did Zack play?
When did Zack start to play?
The clock shows 3:00.
When did Zack stop playing?
The clock shows 5:00.
Count the hours from
3 o’clock to 5 o’clock. Zack played for 2 hours.
E x am p l E
2
Mrs. Lin went to work at 8:00.
She came home at 6:00.
How many hours was
Mrs. Lin gone?
Count the hours from
8 o’clock to 6 o’clock.
Mrs. Lin was gone for 10 hours.
Chapter 22 – Lesson 2
11
12
1
2
10
9
3
4
8
7
6
5
Count the hours from
8 o’clock to 12 o’clock,
then from 12 o’clock to 6.
Add 4 ! 6 " 10.
page 257
Name
P RAC T I C E
Solve.
1
Bob started work at 7:00.
He stopped 3 hours later.
Tai-lin started cooking at
5:30.
When did he stop work?
She finished at 6:30.
2
How long did she cook?
10 o’clock
1 hour
3
Tyrone started practice at
4:00 o’clock.
4
He finished at 8:00 o’clock.
Sara went to school at
9:00 o’clock.
She came home at 3:00
o’clock.
How long did he practice?
How long was she gone?
4 hours
Circle the time that is longer.
5
2 hours
6
90 minutes
7
90 minutes
120 minutes
8
1 hour
Math
Reasoning
9
1 hour 20 minutes
3 weeks
20 days
Show the Time
MR 1.2
Complete the face of the analog
clock.
Then draw to show the same time
as you see on the digital clock.
page 258
12
10:30
9
3
6
Chapter 22 – Lesson 2
B – © CSL Associates, Inc. All rights reserved.
6 hours
Name
P RAC T I C E
Solve.
1
Pat started work at 6:00.
2
He stopped 3 hours later.
Juan went to school at
8:00 o’clock.
He came home at 2:00
o’clock.
When did he stop work?
9 o’clock
How long was he gone?
6 hours
Sara started practice at 3:00
o’clock.
4
Babs started cooking at 4:30.
She finished at 7:00 o’clock.
She finished at 5:30.
How long did she practice?
How long did she cook?
1 hour
4 hours
Circle the time that is longer.
5
3 hours
6
90 minutes
7
90 minutes
120 minutes
8
1 hour 30 minutes
Math
Reasoning
9
1 hour 10 minutes
4 weeks
27 days
Show the Time
MR 1.2
Complete the face of the analog
clock.
Then draw to show the same time
as you see on the digital clock.
page 172
12
11:45
Home Resource and Homework
9
3
6
Chapter 22 Lesson 2
B – © CSL Associates, Inc. All rights reserved.
3
MCX94TEG2Ch01_30.v9.4.1 2/19/01 19:52 Page 473
Name
P RAC T I C E
Solve.
1
Bob started work at 7:00.
He stopped 3 hours later.
Tai-lin started cooking at
5:30.
When did he stop work?
She finished at 6:30.
2
How long did she cook?
10 o’clock
1 hour
3
Tyrone started practice at
4:00 o’clock.
4
He finished at 8:00 o’clock.
Sara went to school at
9:00 o’clock.
She came home at 3:00
o’clock.
How long did he practice?
How long was she gone?
4 hours
B – © CSL Associates, Inc. All rights reserved.
6 hours
Circle the time that is longer.
5
2 hours
6
90 minutes
7
90 minutes
120 minutes
8
1 hour
Math
Reasoning
9
1 hour 20 minutes
3 weeks
20 days
Show the Time
MR 1.2
Complete the face of the analog
clock.
Then draw to show the same time
as you see on the digital clock.
Chapter 22 – Lesson 2
11
12
1
10
10:30
Student Book Page
2
9
3
8
4
7
6
5
page 258
Name
P RAC T I C E
Solve.
1
Pat started work at 6:00.
2
He stopped 3 hours later.
Juan went to school at
8:00 o’clock.
He came home at 2:00
o’clock.
When did he stop work?
9 o’clock
How long was he gone?
6 hours
Sara started practice at 3:00
o’clock.
4
Babs started cooking at 4:30.
She finished at 7:00 o’clock.
She finished at 5:30.
How long did she practice?
How long did she cook?
1 hour
4 hours
Circle the time that is longer.
5
3 hours
6
90 minutes
7
90 minutes
120 minutes
8
1 hour 30 minutes
Math
Reasoning
9
1 hour 10 minutes
4 weeks
27 days
Show the Time
MR 1.2
Complete the face of the analog
clock.
Then draw to show the same time
as you see on the digital clock.
page 172
11
12
1
10
11:45
Home Resource and Homework
2
9
3
8
4
7
6
5
Chapter 22 Lesson 2
B – © CSL Associates, Inc. All rights reserved.
3