This handy Math in Focus Grade 3 Workbook Answer Key Chapter 16 Practice 3 Addition of Time provides detailed solutions for the textbook questions.
Math in Focus Grade 3 Chapter 16 Practice 3 Answer Key Addition of Time
Add
Example
Question 1.
So, 3 h 25 min + 5 h 30 min
= ______ h _______ min.
______ h + ______ h = ______ h
______ min + ______ min = ______ min
______ h + ______ min = ______ h ______ min
Answer: 8 hour 55 minutes.
Follow the below steps :
1. Add the hours
2. Add the minutes
3. If the minutes are 60 or more, subtract 60 from the minutes and add 1 to hours
Explanation:
Step 1: First add hours.
= 3 hours+5 hours
=8 hours.
Step 2: Add minutes.
= 25 min+30 min
= 55 min.
Finally, we get in hours and minutes are 8 hours 55 minutes.
Question 2.
So, 7 h 30 min + 3 h 14 min
= ______ h _______ min.
______ h + ______ h = ______ h
______ min + ______ min = ______ min
______ h + ______ min = ______ h ______ min
Answer: 10 hours 44 minutes.
Follow the below steps :
1. Add the hours
2. Add the minutes
3. If the minutes are 60 or more, subtract 60 from the minutes and add 1 to hours
Explanation:
Step 1: First add hours.
= 7 hours+3 hours
=10 hours.
Step 2: Add minutes.
= 30 min+14 min
= 44 min.
Finally, we get in hours and minutes are 10 hours 44 minutes.
Question 3.
So, 2 h 50 min + 1 h 9 min
= ______ h _______ min.
______ h + ______ h = ______ h
______ min + ______ min = ______ min
______ h + ______ min = ______ h ______ min
Answer: 3 hour 59 minutes.
Follow the below steps :
1. Add the hours
2. Add the minutes
3. If the minutes are 60 or more, subtract 60 from the minutes and add 1 to hours
Explanation:
Step 1: First add hours.
= 2 hours+1 hours
=3 hours.
Step 2: Add minutes.
= 50 min+9 min
= 59 min.
Finally, we get in hours and minutes are 3 hours 59 minutes.
Add
Question 4.
20 min + 55 min = __________ min
Answer: 1 hour 15 minutes.
Explanation:
The given question is 20 min+55 min=X min.
If we add 20 min and 55 min then we get 20+55=75 min.
To this 75 minutes, we need to convert in hours and minutes.
75 can be written as 60 and 15:
1 hour=60 minute.
And remaining 15 minutes will stay the same.
Finally, 75 min=1 hours 15 minutes.
Question 5.
55 min + 45 min = __________ min
Answer:
The given question is 55 min+45 min=X min.
If we add 55 min and 45 min then we get 55+45=100 min.
To this 100 minutes, we need to convert in hours and minutes.
100 can be written as 60 and 40:
1 hour=60 minute.
And remaining 40 minutes will stay the same.
Finally, 100 min=1 hours 40 minutes.
Question 6.
4 h 46 min + 2 h 14 min = _____ h _____ min
= ________ h
Answer: 7 hours.
Follow the below steps :
1. Add the hours
2. Add the minutes
3. If the minutes are 60 or more, subtract 60 from the minutes and add 1 to hours
Explanation:
Step 1: First add hours.
= 4 hours+2 hours
=6 hours.
Step 2: Add minutes.
= 46 min+14 min
= 60 min.
Step 3: Apply rule 3. We got 60 minutes. So subtract 60 and add 1 to the hours.
=60-60
=0.
Adding 1 to the hours:
= 6 hours+1
=7 hours.
Therefore, the answer is 7 hours.
Question 7.
1 h 48 min + 3 h 35 min = _____ h _____ min
= _____ h _____ min
Answer: 5 hours 23 minutes.
Follow the below steps :
1. Add the hours
2. Add the minutes
3. If the minutes are 60 or more, subtract 60 from the minutes and add 1 to hours
Explanation:
Step 1: First add hours.
= 1 hours+3 hour
=4 hours.
Step 2: Add minutes.
= 48 min+35 min
= 83 min.
Step 3: Apply rule 3. We got 60 minutes. So subtract 60 and add 1 to the hours.
=83-60
=23.
Adding 1 to the hours:
= 4 hours+1
=5 hours.
Therefore, the answer is 5 hours 23 minutes.
Solve.
Question 8.
Grace spends 50 minutes practicing the piano. Then she spends 2 hours 1 5 minutes doing her homework. How long does she spend on the two tasks?
Answer:
The minutes she spends on the piano=50 min
The time spends on her homework=2 h 15 min
The total time she spends on both works=X
By following some steps we need to calculate the total hours and min.
1. Add the hours
2. Add the minutes
3. If the minutes are 60 or more, subtract 60 from the minutes and add 1 to hours
Explanation:
Step 1: First add hours.
= 0+2
=2 hours.
Step 2: Add minutes.
= 50 min+15 min
= 65 min.
Step 3: Apply rule 3. We got 60 minutes. So subtract 60 and add 1 to the hours.
=65-60
=5.
Adding 1 to the hours:
= 2 hours+1
=3 hours.
Therefore, the answer is 3 hours 5 minutes.
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