Adding and Subtracting Time

We will learn how to addition and subtraction of units of time.

1. Add 25 minutes 45 seconds and 15 minutes 25 seconds.

Solution:

$Add Time$

First add the seconds 45 + 25 = 70 seconds

Convert 70 seconds into minutes and seconds

70 seconds = 60 seconds + 10 seconds

Carry 1 minute to minutes column and write 10 in seconds column

Therefore, 25 minutes 45 seconds + 15 minutes 25 seconds = 41 minutes 10 seconds

3. Add 9 months 25 days 21 hours and 7 months 20 days 13 hours.

$Addition of Months Days and Hours$

Ans: 17 months 16 days and 10 hours

Step I: Add the hours

21 + 13 = 34 hours

= 24 hours + 10 hours

= 1 day 10 hours

Step II: Write 10 under hours and carry 1 to days.

Step III: Add the days.

1 + 25 + 20 = 46 days

= 30 days + 16 days

= 1 month 16 days

Step IV: Write 16 under days and carry 1 to months.

Step V: Add the months

1 + 9 +7 = 17 months

Write 17 under months

2. Add 5 weeks 4 days and 4 weeks 5 days

Solution:

$Addition of Weeks and Days$

First add days, 4 + 5 = 9 days

Convert 9 days into weeks and days

9 days = 7 days + 2 days

= 1 week and 2 days

Carry 1 to week column and write 2 in days column.

Therefore, 5 weeks 4 days + 4 weeks 5 days = 10 weeks 2 days

3. Subtract 18 minutes 29 seconds from 24 minutes 15 seconds

Solution:

$Subtraction of Time$

First subtract seconds

Since we cannot subtract 29 from 15, we borrow 1 minute. So, 15 + 60 = 75 seconds

75 – 29 = 46 seconds

Write 46 in seconds column

Now subtract minutes 23 – 18 = 5 minutes, write 5 in minutes column

Therefore, 24 minutes 15 seconds - 18 minutes 29 seconds = 5 minutes 46 seconds

4. Subtract 7 years 6 months from 8 years 3 months

Solution:

$Adding and Subtracting Time$

First subtract the months

We borrow 1 year and subtract, 16 – 6 = 9 months

Write 9 in months column and now subtract 7 – 7 = 0

Write 0 in years column.

Therefore, 8 years 3 months - 7 years 6 months = 9 months

1. Subtract 6 hours 40 minutes from 8 hours 55 minutes

Step I: Subtract the minutes.

55 – 40 = 15 minutes

Step II: Subtract hours.

8 – 6 = 2 hours

$Subtraction of Hours and Minutes$

Ans: 2 hours 15 minutes

2. Subtract 10 hours 50 minutes from 12 hours 45 minutes.

$Subtract Hours and Minutes$

Ans: 1 hour 55 minutes

Step I: We cannot subtract 50 minutes from 45 minutes.

So borrow 1 hour from 12 hours.

1 hour = 60 minutes

60 + 45 = 105 minutes

Step II: Subtract minutes.

105 – 50 = 55 minutes

Write 55 under minutes.

Step III: 12 – 1 = 11 hours remain in hours

Step IV: Subtract hours.

11 – 10 = 1 hour

Step V: Write 1 under hours.

Questions and Answers on Adding and Subtracting Time:

I. Add the following.

1.	Hours	Minutes
	30	20
+	20	05

2.	Hours	Minutes
	45	48
+	10	12

3.	Days	Hours
	33	20
+	45	14
+	50	16

4.	Weeks	Days
	32	4
+	10	6
+	48	5

5.	Hours	Minutes	Seconds
	17	42	30
+	12	36	20
+	15	50	50

6.	Years	Months
	56	10
+	43	05
+	17	11

II: Subtract the following.

1.	Hours	Minutes	Seconds
	16	30	20
-	15	20	50

2.	Hours	Minutes	Seconds
	13	23	43
-	10	22	32

You might like these

Multiplication and Division of Units of Measurement | Metric System
We will learn how to multiply and divide of units of measurement. We carry out multiplication and division of measurements as we do for decimal numbers: 1. Multiply 12 km 56 m by 7. Solution: 12 km 56 m = 12.056 m Hence, 12.056 × 7 = 84.392 km 2. Multiply 44 dam 28 cm by 12
Worksheet on Word Problems on Measurement | 5th Grade Word Problem
Practice the questions given in the worksheet on word problems on measurement. 1. Rachel has a rope of length 40 m. She gave 12 m 53 cm to Sam, 18 m 35 cm to Ron and 9 m 7 cm to Jack. What length of rope is still left with Rachel?
Addition and Subtraction of Units of Measurement | Metric Units
We can add the units of measurement like decimal numbers. 1. Add 5 m 9 dm and 11 m and 5 dm Solution: 5 m 9 dm = 5.9 m 11 m 5 dm = 11.5 m Hence, 5 m 9 dm + 11 m 5 dm = 17 m 4 dm or 17.4 m 2. Add 15 cm 5 mm and 21 cm 9 mm
Worksheet on Word Problem on Measuring Length | Length Word Problems
Practice the questions given in the worksheet on word problem on measuring length (i.e. addition and subtraction). Addition and subtraction in metres and centimetres is done in the similar
5th Grade Time Worksheet | Fifth Grade Time Worksheets | Elapsed Time
In 5th grade time worksheet, students can practice the questions on units for measuring time. The questions are based on convert the time, addition of time, subtraction of time, elapsed time, Word problems on time.
Elapsed Time | What is Elapsed Time? | Math Elapsed Time | 5th Grade
Sometimes we want to find out the duration of an activity. We can calculate the duration or time elapsed if we know the starting and finishing time. For example, if the bus starts at 9:00 a.m. and reaches the school at 9:30 a.m. the time taken by the bus to reach school is
Worksheet on Word Problems on Measurement of Time | Time Measurement
Practice the questions given in the worksheet on word problems on measurement of time. The questions are based on addition and subtraction of hours, minutes and seconds separately. 1. A bus leaves for Rampur at 4:30 p.m. It takes 1 hr. 25 min. to reach there.
Multiplication and Division of Time |Weeks|Days|Hours|Minutes|Seconds
We will learn how to multiplication and division of units of time. 1. Multiply 9 hours 10 minutes by 6 Solution: First multiply minutes 10 × 6 = 60 minutes = 1 hour We carry 1 hour to hour column and write 0 in minutes column. Now, multiply hours, 9 × 6 + 1 = 55 Write 55 in
Worksheet on Subtraction of Hours, Minutes and Seconds |Time Worksheet
Practice the questions given in the worksheet on subtraction of hours, minutes and seconds. Note: Here we need to subtract the hours, minutes and seconds separately. Find the difference of the following: 1. 84 hr. 37 min. 29 sec. - 4 hr. 29 min. 18 sec. 2. 3 hr. 28 min.
Worksheet on Addition of Hours, Minutes and Seconds | Time Worksheets
Practice the questions given in the worksheet on addition of hours, minutes and seconds. Note: Here we need to add the hours, minutes and seconds separately. Find the sum of the following: 1. 3 hr. 17 min. 24 sec. + 4 hr. 32 min. 14 sec. 2. 6 hr. 10 min. 31 sec.
Worksheet on Units of Time | Questions on Units for Measuring Time
In worksheet on units of time, all grade students can practice the questions on units for measuring time. This exercise sheet on units of time have different units like second, minute, hour, day, week, month and year that can be practiced by the students to get more ideas to
5th Grade Measurement Worksheet | K5 Learning | Metric Units | Answers
In 5th Grade Measurement Worksheet we will solve how to convert metric units, compare the measurements and word problems on measurements. I. Convert the following: (i) 1 kilogram = …. hectogram (ii) 1 hectogram = …decigram (iii) 1 centigram = …decameter (iv) 1 decimeter
Worksheet on Division of Metric Measures | Basic Metric Measurements
Practice the questions given in the worksheet on division of metric measures. Metric measures are divided in the same way as we divide ordinary numbers. I. Divide the following: (i) 6 g 9 dg 7 cg 5 mg by 3 (ii) 4 kl 2 hl 5 dal 4 l by 2 (iii) 7 l 3 dl 6 cl 5 ml by 5
Worksheet on Multiplication of Metric Measures |Word Problems |Answers
Practice the questions given in the worksheet on multiplication of metric measures. Metric measures are multiplied in the same way as we multiply ordinary numbers. I. Find the product of the following: (i) 5 kg 2 hg 7 dag 9 g × 3 (ii) 4 kl 3 hl 8 dal 7 l × 9
Worksheet on Addition and Subtraction of Units of Measurement |Answers
Worksheet on addition and subtraction of units of measurement we will solve different types of questions on mixed measurement. Here we will solve addition of lengths, addition of mass or addition of weights, addition of volumes, subtraction of lengths, subtraction of mass