# Into Math Grade 3 Module 12 Lesson 4 Answer Key Find Start and End Times

We included HMH Into Math Grade 3 Answer Key PDF Module 12 Lesson 4 Find Start and End Times to make students experts in learning maths.

## HMH Into Math Grade 3 Module 12 Lesson 4 Answer Key Find Start and End Times

I Can find the start time or the end time when I know the elapsed time.

Step It Out

Question 1.
Rita makes a painting of a horse. She starts painting at 1:20 p.m. She spends 48 minutes painting. At what time does she finish painting? A. Count forward on the number line to add the elapsed time to the start time. Show jumps and the times.  Explanation:
She starts painting at 1:20 p.m.
She spends 48 minutes by painting.
At 2 : 08   she finished the painting

B. How did you decide what size jumps to make?
For easy and less jumps. I have decided to take the time gap as 10 minutes
If I choose 5 minutes the number of jumps will be more
Explanation:
Choose 10 mins for one jump.

C. At what time do the jumps end?
At what time does Rita finish the painting?
At 2:08
Explanation:
As she started at 1:20 p.m. and traveled for 48 mins
so, he will stop at 2:08 p.m.

Turn and Talk How can you find the end time using a clock? Compare this method to using a number line. Which method do you prefer? Why?
1st method is by adding or subtracting the time.
for time we are adding or subtracting hours and minutes separately.
For 2nd method is number line
in number line we use time intervals
Explanation:
number line is easy we can visual the time by intervals.

Question 2.
It takes Mason 35 minutes to make a clay animal. He finishes at 11:45 a.m. At what time did Mason start making the clay animal? A. Count back on the number line from the end time to subtract the elapsed time. Show jumps and the times.  Explanation:
I have choose the time interval as 10 minutes
3 x 10 = 30
30 + 5 = 35 minutes as time intervals.
so, the mason started making clay animal at 11:10 a.m.

B. How did you decide what size jumps to make?
I have choose the time interval as 10 minutes
3 x 10 = 30
30 + 5 = 35 minutes as time intervals.
Explanation:
For easy and less jumps. I have decided to take the time gap as 10 minutes
If I choose 5 minutes the number of jumps will be more

C. Draw hands on the clock to show the start time. At what time did Mason start making the clay animal?  Explanation:
The mason started making clay animal at 11:10 a.m.
The short hand represent as hours hand and
long hand represent the minutes hand.

Turn and Talk How is finding the start time different from finding the end time? Explain.
For starting time we have to subtract the given time.
For ending time we have to add the given time.
Explanation:
Add the time intervals and subtract the time intervals on the number line.

Check Understanding

Question 1.
Use the number line to find the start time.
End time: 6:31 p.m.
Elapsed time: 26 minutes  Explanation:
End time: 6:31 p.m.
so, we have to subtract 26 minutes from the 6 : 31
6 : 31 – 0 :  26 = 6 : 05
the starting time is 6 : 05 p.m.

Question 2.
Use Tools Billy starts making a paper bird at 2:28 p.m. He works for 40 minutes. At what time does Billy finish making the paper bird? Use the number line to find the end time. Then show the time on the clock.  Explanation:
Billy starts making a paper bird at 2:28 p.m.
He works for 40 minutes.
2 : 28 + 0 : 40 = 3 : 08

At what time does Billy finish making the paper bird?
Billy finish making the paper bird at 3 : 08p.m.
Explanation:
Billy starts making a paper bird at 2:28 p.m.
He works for 40 minutes.
2 : 28 + 0 : 40 = 3 : 08

Use Tools Use the number line to find the time.

Question 3.
Find the start time.
End time: 9:20 a.m.
Elapsed time: 38 minutes  Explanation:
End time: 9:20 a.m.
Elapsed time: 38 minutes
We have to subtract the elapsed time from 9 : 20
9 : 20 – 38 = 8 : 42
8:42 a.m. is the starting time.

Question 4.
Find the end time.
Start time: 1:45 p.m.
Elapsed time: 18 minutes  Explanation:
Start time: 1:45 p.m.
Elapsed time: 18 minutes
We have to add the elapsed time to 1:45
1:45 + 0:18 = 2 : 03 p.m.

Question 5.
Use Structure Use a number line to find the time.  Explanation:   Question 6.
Open-Ended Write and solve a word problem that describes the end time of an activity with a start time that is 5:10 p.m. and an elapsed time of 45 minutes.
John started playing table tennis at 5:10 p.m. He played for 45 minutes and ended the practice.
At what time John ended the play.
Explanation:
5 : 10 + 0 : 45 = 5 : 55 p.m.
so, he ended the game at 5 : 55 p.m.

Use Tools Draw hands on the clock to show the time. Write the start or end time.

Question 7.
Show the start time.
End time is 6:25 p.m.
Elapsed time is 50 minutes.  Explanation:
End time is 6:25 p.m.
Elapsed time is 50 minutes.
for the starting time we have to subtract the elapsed time
6 : 25 – 0 : 50 = 5 : 35
start time = 5 : 35 p.m.

Question 8.
Show the end time.
Start time is 8:30 a.m.
Elapsed time is 44 minutes.  Explanation:
Start time is 8:30 a.m.
Elapsed time is 44 minutes.
for end time we have to add the elapsed time
8 : 30 + 0 : 44 = 9 : 14

Question 9.
Reason Trish and Lana draw portraits. Trish starts at 4:15 p.m. and finishes at 4:40 p.m. Lana finishes at 4:55 p.m. She draws for the same amount of time as Trish. At what time does Lana start drawing? Explain your answer. 