1. Today we will be learning about
Good Afternoon!
Today we will be learning about
Elapsed time
Let’s warm up :
Find the amount of change:
1) Price: $ Amount Given: $20.00
2) Price: $5.78 Amount Given: $10.00
Round the given money amount :
3) $5.07, $4.58, $8.69
4) $14.78, $24.22, $32.57
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2. Let’s review the previous topic Money (make change, compare and order)
Currency: It is a unit of exchange, facilitating the transfer of goods and/or services.
It is one form of money, where money is anything that serves as a medium of exchange, a store of value, and a standard of value.
To facilitate trade between currency zones, there are exchange rates, which are the prices at which currencies (and the goods and services of individual currency zones) can be exchanged against each other.
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3. Coins and paper money are both forms of currency.
Review
Coins and paper money are both forms of currency.
Nickel
1 nickel,
5 cents,
or 5¢
5 cents= 1 nickel
Penny
1 penny,
1 cent,
or 1¢
Dime
1 dime,
10 cents
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4. Quarter Dollar Bill 1 quarter, 25 cents, 1 Dollar 100 cents, or 100¢
Review
Quarter
1 quarter,
25 cents,
Dollar Bill
1 Dollar
100 cents,
or 100¢
Count by 100 to count dollars.
$1.00, $2.00, $3.00 and so on.
4 quarters = 1 Dollar
20 nickels = 1 Dollar
10 dimes = 1 Dollar
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5. Review
Make Change
Mary bought a bag at a price of $7.67; Amount given to the shopkeeper was $ What change did she get?
Start at $7.67. Count up to $10.00
$ $ $ $ $ $ $10.00
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6. So Mary should receive $2.33 as change.
Review
Make Change
To check the change count the bills and coins from the greatest to least value.
$ $ $ $ $ $ $2.33
So Mary should receive $2.33 as change.
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7. Compare and Order Money Amounts
Review
Compare and Order Money Amounts
You can use a place value chart to compare money amounts.
Start at left.
Look for the first place where the digits are different.
Example: Compare $ and $319.23
Hundred Dollars
Ten Dollars
One Dollar
Cents 3 6 97 1 9 23
Same
different
The amount $ has more ten dollars than $306.97
So, $ > $306.97
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8. Review
Round Money
Round: $7.13, $6.89, $6.95
Step 1: Find the digit in the dollars place.
Step 2: Look at the place to the right of the dollars place.
$7.13
$6.89
$6.95
$7.13
$6.89
$6.95
Step 3: If the digit is less than 5, round down. If the digit is 5 or greater, round up.
$7.13 $7.00
$6.89 $7.00
$6.95 $7.00
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9. Today we will discuss about the time.
Let’s start the topic
Elapsed time
Today we will discuss about the time.
A day has 24 hours. These 24 hours is divided into two time zones. These are “A.M.” and “P.M.”.
The standard unit of time is second.
A.M.: A name for time between 12:00 midnight and 12:00 noon.
On school days you might wake up at 7:00 A.M.
P.M.: A name for time between 12:00 noon and 12:00 midnight.
Many people eat dinner at 6:00 P.M.
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10. The simple conversion table for time is:
Time Facts
60 seconds
1 minute
15 minutes
1 quarter-hour
60 minutes
1 hour
90 minutes
1 ½ hours
180 minutes
3 hours
To convert from minutes to seconds multiply by 60 and to convert from seconds to minutes divide by 60.
Similarly,
To convert from hours to minute multiply by 60 and to convert from minute to hours divide by 60.
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11. Tell Time 9:15 A.M. Nine-fifteen in the morning, or
Quarter after nine, or
Fifteen minutes after nine
4:25 P.M.
Four twenty-five in the afternoon, or
25 minutes after 4
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12. Tell Time 15 minutes (min) = ¼ hour (1/4 h) or 1 quarter hour
2 quarter hours
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13. Tell Time 45 minutes (min) = 60 minutes (min) = ¾ hour (3/4 h) or
3 quarter hours
60 minutes (min) =
1 hour (1 h) or
4 quarter hours
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14. Example: How much time has elapsed between 8:20 A.M. and 11:35 A.M.?
Elapsed Time
Elapsed Time: It is the amount of time that passes from the start to the end of an activity.
Example: How much time has elapsed between 8:20 A.M. and 11:35 A.M.?
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15. Elapsed Time Step 1: First count the number of hours.
From 8:20 to 11:35 is 3 hours.
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16. Elapsed Time Step 2: Then count the number of minutes.
From 11:20 to 11:35 is 15 minutes.
So, 3 hours 15 minutes has passed.
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17. Count past midnight What time is 4 hours 20 minutes after 11.00 p.m.?
Start at p.m. Count on 4 hours.
> > > > 3.00
Add on 20 minutes: 3.20 a.m.
(Note: After midnight write A.M.)
So, 4 hours 20 minutes after p.m. is 3.20 a.m.
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18. Complete the conversion tables:
Assessment
Complete the conversion tables: 1)
Hours 1 2 3 4 5
Minutes 60
180 2)
Seconds 60
120
180
240
300
Minutes 1 4 3)
Hours 5 8
Minutes
180
360
540
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19. Calculate how much time has elapsed between:
4) 5:30 A.M. and 8:35 A.M.?
5) 7:55 P.M. and 10:40 P.M.?
6) 2:15 A.M. and 9:25 A.M.?
7) 8:30 P.M. and 9:40 P.M.?
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20. Calculate how much time has elapsed between:
8) 8:30 A.M. and 1:10 P.M.?
9) 9:35 A.M. and 3:40 P.M.?
10) 10:15 P.M. and 9:25 A.M.?
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21. The simple conversion table for time is:
Very Good!
Let's Review
A day has 24 hours. These 24 hours is divided into two time zones. These are “A.M.” and “P.M.”.
A.M.: A name for time between 12:00 midnight and 12:00 noon.
On school days you might wake up at 7:00 A.M.
P.M.: A name for time between 12:00 noon and 12:00 midnight.
Many people eat dinner at 6:00 P.M.
The simple conversion table for time is:
Time Facts
60 seconds
1 minute
15 minutes
1 quarter-hour
60 minutes
1 hour
90 minutes
1 ½ hours
180 minutes
3 hours
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22. Tell Time 9:15 A.M. Nine-fifteen in the morning, or
Review
Tell Time
9:15 A.M.
Nine-fifteen in the morning, or
Quarter after nine, or
Fifteen minutes after nine
4:25 P.M.
Four twenty-five in the afternoon, or
25 minutes after 4
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23. Tell Time 45 minutes (min) = 60 minutes (min) = ¾ hour (3/4 h) or
Review
Tell Time
45 minutes (min) =
¾ hour (3/4 h) or
3 quarter hours
60 minutes (min) =
1 hour (1 h) or
4 quarter hours
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24. How much time has elapsed between 8:20 A.M. and 11:35 A.M.?
Review
Elapsed Time: It is the amount of time that passes from the start to the end of an activity.
How much time has elapsed between 8:20 A.M. and 11:35 A.M.?
Step 1: First count the number of hours.
From 8:20 to 11:20 is 3 hours.
So, 3 hours 15 minutes has passed.
Step 2: Then count the number of minutes.
From 11:20 to 11:35 is 15 minutes.
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25. Count past midnight What time is 4 hours 20 minutes after 11.00 p.m.?
Review
Count past midnight
What time is 4 hours 20 minutes after p.m.?
Start at p.m. Count on 4 hours.
> > > > 3.00
Add on 20 minutes: 3.20 a.m.
(Note: After midnight write A.M.)
So, 4 hours 20 minutes after p.m. is 3.20 a.m.
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26. See you in the next session.
You have done a nice job.
See you in the next session.
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