Spectrum Math Grade 3 Chapter 8 Lesson 2 Answer Key Time on a Number Line

Students can use the Spectrum Math Grade 3 Answer Key Chapter 8 Lesson 8.2 Time on a Number Line as a quick guide to resolve any of their doubts.

Spectrum Math Grade 3 Chapter 8 Lesson 8.2 Time on a Number Line Answers Key

Quinn gets up at 7:30 a.m. She leaves the house at 9:20 a.m. How much time passed between when she got up and left the house?
Spectrum Math Grade 3 Chapter 8 Lesson 2 Answer Key Time on a Number Line 1
First, find out how much time until the next hour.
Second, find out how much time passed since the previous hour.
Then, find out how much time passed between the next hour and the previous hour.
Last, add up the minutes and hours to find out the total time that has passed.

Solve.
Answer:
1 hour 50 minutes,

Explanation:
Time taken until the next hour is 30 minutes time passed since the previous hour is 20 minutes and time passed between them is 1 hour, So  total time that has passed 30 min + 20 min + 1 hour = 50 minutes + 1 hour = 1 hour 50 minutes.

Question 1.
Alexa went to the bookstore at 5:45 p.m. She left the bookstore at 9:10 p.m. How long was Alexa at the bookstore?
Spectrum Math Grade 3 Chapter 8 Lesson 2 Answer Key Time on a Number Line 2
Answer:
3 hours 25 minutes,

Explanation:
Given time when Alexa went to the bookstore is 5:45 pm and time when she left to the bookstore is 9:10 pm. So, to calculate time firstly divide the time into intervals and then minutes in the last interval so 5:45 pm to 6:45 pm = 1 hour, 6:45 pm to 7:45 pm = 1hour, 7:45 pm to 8:45 pm = 1 hour, 8:45 pm to 9:10 pm = 25 minutes. Therefore, Alexa spent time at bookstore is 3 hours 25 minutes.

Question 2.
Hugo leaves for work at 7:45 a.m. He leaves work to go home at 4:15 p.m. How much time does Hugo spend at work?
Spectrum Math Grade 3 Chapter 8 Lesson 2 Answer Key Time on a Number Line 3
Answer:
8 hours 30 minutes,

Explanation:
Given Hugo leaves for work is 7:45 am that is starting time and ending time he leaves work is 4:15 pm. So, first convert ending time into standard time. So add 12 hours that is 4:15 pm + 12 pm = 16:15 p.m. Now convert into minutes 7:45 = (7 x 60) minutes + 45 minutes = 420 minutes + 45 minutes = 465 minutes and 16:15 pm = (16 X 60) minutes + 15 minutes = 960 minutes + 15 minutes = 975 minutes, So now subtract from ending time to starting time that is 975 minutes – 465 minutes =510 minutes that is (8 x 60) minutes + 30 minutes = 8 hours 30 minutes.

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