Into Math Grade 5 Module 12 Lesson 4 Answer Key Convert Time and Find Elapsed Time

We included HMH Into Math Grade 5 Answer Key PDF Module 12 Lesson 4 Convert Time and Find Elapsed Time to make students experts in learning maths.

HMH Into Math Grade 5 Module 12 Lesson 4 Answer Key Convert Time and Find Elapsed Time

I Can solve elapsed time problems by converting units of time.

Step It Out

Question 1.
Claudio wants to ride the exercise bike at least 5 hours each week. He recorded the amount of time he rode the exercise bike each day last week. Did Claudio reach his goal last week?


Time Conversions
1 minute (mm) = 60 seconds (sec)
1 hour (hr) = 60 minutes
1 day (d) = 24 hours
1 week (wk) = 7 days
1 year (yr) = about 52 weeks
1 year = 365 days

A. Find the total number of minutes Claudio rode the bike.
Answer:
A week has 7 days
and the workout done on each day
50 + 35 + 30 + 45 + 40 + 30 +50 = 280 days

B. How can you convert the number of minutes to a number of hours?
Answer:
We have to divide the number of minutes by 60
1 hour = 60 minutes.

C. How many hours did Claudio ride the exercise bike last week? Write the answer as a mixed number.
Answer:
1 hour = 60 minutes
so, dividing 280 by 60 we get 4 hour 40 minutes
280 ÷ 60 = 4\(\frac{2}{3}\)

D. Did Claudio reach his goal? Explain.
Answer:
No
Explanation:
5 hour = 5 x 60 = 300 minutes
As he set the goal to 300 minutes
but he did 280 minutes
280 < 300 so, he didn’t reach the goal.

Turn and Talk Claudio rode the exercise bike for 7,920 minutes in the past year. Explain how to convert this number of minutes to an equivalent number of days.
Answer:
7,920 minutes = 5.5 days.
Explanation:
Claudio rode the exercise bike for 7,920 minutes in the past year.
for converting a day has 24 hours
multiplying 24 x 60 = 1440 minutes.
7920 ÷ 1440 = 5.5 days

Question 2.
Abram arrives at the swim meet at 9:30 a.m. and stays for 225 minutes. At what time does he leave?

A. Find the number of hours Abram is at the swim meet. Convert 225 minutes to a number of hours. For how many hours is Abram at the meet?
Answer:
3 hours 45 minutes Abram at the meet
Explanation:
225 minutes to a number of hours.
divide the number of minutes by 60
225 ÷ 60 = 3 hours 45 minutes

B. Use a number line with increments of 15 minutes to represent the elapsed time. Count the number of whole hours and then the number of quarter-hours.

Answer:

Explanation:
From 9:30 a.m. he stayed for 3 hours and 45 minutes
explained through the time line
Abram leaves at 1:15 p.m.
from 9:30 to 12:30 it is 3 hours and
from 12:30 to 1:15 it is 45 minutes.

C. At what time does Abram leave?
Answer:
Abram leaves at 1:15 p.m.

Turn and Talk Terrance leaves the swim meet at the same time as Abram. If he was at the swim meet for 2\(\frac{1}{2}\) hours, how can you determine at what time he arrived?
Answer:

Explanation:
swim meet for 2\(\frac{1}{2}\) hours,
That is 2 hours and 30 minutes
Explained through time line he left the swim meet at 1:15 p.m.
so, 2 and half hours before 1:15 p.m. is 10:45 he arrived.

Check Understanding

Question 1.
Two weeks ago, Claudio rode the exercise bike each day for these numbers of minutes: 45, 35, 50, 20, 40, 40, and 30. Did he reach his goal of riding at least 5 hours each week? Explain.
Answer:
No,
Explanation:
Total numbers of minutes = 45, 35, 50, 20, 40, 40, and 30 = 260
divide the time volume by 60 to convert to hours
260 ÷ 60= 4 hours 20 minutes
4 hours 20 minutes is less than 5 hours.

Question 2.
Marcus gets to the library at 11:00 a.m. He stays for 150 minutes. At what time does he leave the library?
Answer:
Marcus left the library at 1:30 p.m.
Explanation:
1 hour = 60 minutes
Divide the time volume by 60
150 minutes = 2 hour 30 minutes
11:00 a.m. after 2 hour 30 minutes is 1:30 p.m.

Convert.

Question 3.
495 min = ___________ hr
Answer:
495 min = 8.25 hr
Explanation:
1 hour = 60 minutes.
495 min for converting we have to divide by 60
495 ÷ 60 = 8 hours 15 minutes

Question 4.
35d =_________ wk
Answer:
35d =5 wk
Explanation:
1 week = 7 days
so, we have to divide by 7
35 ÷ 7 = 5 weeks

Question 5.
300 sec = __________ min
Answer:
300 sec = 5 min
Explanation:
1 minute = 60 seconds.
300 sec for converting we have to divide by 60
300 ÷ 60 = 5 minutes

Question 6.
2\(\frac{1}{2}\) yr = about ________ wk
Answer:
2\(\frac{1}{2}\) yr = about 134 wk
Explanation:
1 year = 52 weeks
2 years = 52 x 2 = 104 weeks
\(\frac{1}{2}\) year = 52 ÷ 2 = 26 week
108 + 26 = 134 weeks

On Your Own

Question 7.
Use Tools Ms. Luz looks at the clock at the airport. Her flight is scheduled to leave at 2:15 p.m. How long does Ms. Luz have to wait?

What time is it now?
Answer:
11:45 a.m. is the time now
Explanation:
The short hand shows the hours and
long hand shows the minutes.

Use the number line to show how long Ms. Luz has to wait.

Answer:

Explanation:
With the help of time line we can say that
Ms. Luz have to wait 2 hours 30 minutes

How long does Ms. Luz wait in hours and minutes?
__________ hr __________ min
Answer:
2 hr 30 min
Explanation:
Ms. Luz looks at the clock at the airport. then the time was 11:45
after waiting 2 hr 30 minutes
the flight leaves at 2:15 p.m.

How many hours does Ms. Luz have to wait?
Answer:
Ms. Luz have to wait 2 hours 30 minutes

Question 8.
Dmitri practiced playing the saxophone for 225 minutes last week. Lauren practiced for 3\(\frac{3}{4}\) hours. Who practiced more? Explain how you know.
Answer:
Both practiced for equal time.
Explanation:
Let us convert both the measures to minutes
saxophone for 225 minutes
3\(\frac{3}{4}\) hours to minutes
multiply with 60
3\(\frac{3}{4}\) x 60 = 225 minutes

Convert.

Question 9.
330 sec = __________ min _________ sec
Answer:
330 sec = 5 min 30 sec
Explanation:
1 minute = 60 seconds
Divide the time value by 60
330 ÷ 60 = 5 minutes and 30 sec

Question 10.
130 hr = __________ d ___________ hr
Answer:
130 hr = 5 d 10 hr
Explanation:
1 day = 24 hr
Divide the time volume by 24
130 ÷ 24 = 5 days 10 hrs.

Question 11.
182 wk = about ___________ yr
Answer:
182 wk = about 3 yr 6 months
Explanation:
1 year = 52 week
Divide the number of weeks by 52
182 ÷ 52 = 3.5 years that is 3 years 6 months

Question 12.
560 min = ___________ hr
Answer:
560 min = 9 hr 20 minutes
Explanation:
1 hr = 60 minutes
divide the time volume by 60
560 ÷ 60 = 9 hr and 20 minutes

Question 13.
490 sec= __________ min
Answer:
490 sec= 8 min 10 sec
Explanation:
1 minute = 60 sec
divide the time value by 60
490 ÷ 60 = 8 min 10 sec

Question 14.
5\(\frac{1}{3}\) d = __________ hr
Answer:
5\(\frac{1}{3}\) d = 128 hr
Explanation:
24 hours = 1 day
multiply the time value by 24
5\(\frac{1}{3}\) d x 24 = 128 hrs

Question 15.
3\(\frac{1}{2}\) min = __________ sec
Answer:
3\(\frac{1}{2}\) min = 210 sec
Explanation:
1 minute = 60 seconds.
multiply the time value by 60
3\(\frac{1}{2}\) min x 60 = 210 sec

Question 16.
4 yr = ____________ d
Answer:
4 yr = 1460 d
Explanation:
1 year = 365 days
multiply the time value by 365
4 x 365 = 1460 days

Find the start, elapsed, or end time.

Question 17.
Start time: 11:15 a.m.
Elapsed time: 5\(\frac{1}{2}\) hr
End time: ______________
Answer:
End time: 4:45 p.m.
Explanation:
5\(\frac{1}{2}\) hr is 5 hr 30 minutes
11:15 after 5 hr 30 minutes is 4:45 p.m.

Question 18.
Start time: 9:30 a.m.
Elapsed time: 380 min
End time: ______________
Answer:
End time: 3:40 p.m.
Explanation:
Elapsed time: 380 min
380 minutes to hours divide by 60
380 by 60 = 6 hr 20 minutes
Start time = 9:30 a.m.
6 hr 20 minutes after 9:30 a.m. is 3:40 p.m.
9 to 3 is 6 hr

Question 19.
Start time: 10:45 a.m.
Elapsed time: __________ hr __________ min
End time: 6:15 p.m.
Answer:
Elapsed time: 7 hr 00 min
Explanation:
elapsed time = end time – start time.
we have to calculate hours and minutes separately.
elapsed time = 10:45 – 6:15 = 7 hrs
6:15 can also written as 18:15

Question 20.
Start time: ______________
Elapsed time: 8\(\frac{1}{6}\) hr
End time: 3:30 p.m.
Answer:
Start time: 7:20 a.m.
Explanation:
8\(\frac{1}{6}\) hr let us convert this to hr and minutes
we have to multiply by 60
490 minutes that is 8 hrs 10 minutes
8 hrs 10 minutes before 3:30 is 7:20 a.m.

Compare. Write <, >, or =.

Question 21.
1\(\frac{1}{2}\) yr 80 wk
Answer:
1\(\frac{1}{2}\) yr  80 wk
Explanation:
1 year = 52 weeks
1\(\frac{1}{2}\) yr by 52 = 78.21 week
78 < 80

Question 22.
500 min 8\(\frac{1}{4}\) hr
Answer:
500 min  8\(\frac{1}{4}\) hr
Explanation:
8\(\frac{1}{4}\) hr to minutes
multiply with 60
8\(\frac{1}{4}\) hr x 60 = 495 minutes

Question 23.
2\(\frac{1}{5}\) hr 7,920 sec
Answer:
2\(\frac{1}{5}\) hr  7,920 sec
Explanation:
1 hr = 3600 sec
we have to multiply with 3600
2\(\frac{1}{5}\) hr x 3600 = 7920 sec

Question 24.
1 wk 180 hr
Answer:
1 wk  180 hr
Explanation:
1 week = 7 days
1 day = 24 hours
7 x 24 = 168 hrs
168 hr is less than 180 hr

Question 25.
Tasha looks at her watch at the start and at the end of the concert. How long was the concert? Give the elapsed time in hours and in minutes.

Answer:
The concert was about 1 hr and 45 minutes
Explanation:
elapsed time = end time – start time.
Subtract the minutes and hours separately.
elapsed time = 9:30 – 7:45 = 1 hr : 45 minutes

Question 26.
Reason Explain how you can find the Start number of hours in one week.
Answer:
one week has 168 hrs
Explanation:
1 week = 7 days
1 day = 24 hours
7 x 24 = 168 hrs

Question 27.
Open-Ended Write an elapsed-time problem that has an answer of 5\(\frac{3}{4}\) hours.
Answer:
Rohit started racing at 9:00 a.m. and ended the race at 12:45 p.m.?
How many hours did Rohit race?
Explanation:
1 hr = 60 minutes
5\(\frac{3}{4}\) hours. convert to minutes
we have to multiply with 60
5\(\frac{3}{4}\) x 60 = 345 minutes = 3 hr 45 minutes