Time Addition and Subtraction | Time Measurement Process

We’ll discover ways to add and subtract time models.

1. Add 25 minutes 45 seconds and quarter-hour 25 seconds.

Answer:

Add the seconds first 45 + 25 = 70 seconds

Convert 70 seconds to minutes and seconds

70 seconds = 60 seconds + 10 seconds

Transfer 1 minute to the minute column and kind 10 within the seconds column

So 25 minutes 45 seconds + quarter-hour 25 seconds = 41 minutes 10 seconds

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

$Month Day and Time Addition$

Reply: 17 months 16 days 10 hours

Step I: add hours

21 + 13 = 34 hours

= 24 hours + 10 hours

= 1 day 10 hours

Step II: Write 10 below the hour and transfer 1 to days.

Step III: Add the times.

1 + 25 + 20 = 46 days

= 30 days + 16 days

= 1 month 16 days

Step IV: Write 16 below days and transfer 1 to months.

Step V: add months

one +9 +7 = 17 months

summer season 17 below the moon

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

Answer:

$Adding Weeks and Days$

First day addition, 4 + 5 = 9 days

Convert 9 days to weeks and days

9 days = 7 days + 2 days

= 1 week and a pair of days

Transfer 1 to the week column and write 2 to the day column.

So 5 weeks 4 days + 4 weeks 5 days = 10 weeks 2 days

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

Answer:

$Time Subtraction$

first subtraction second

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

75 – 29 = 46 seconds

Write 46 within the seconds column

Now subtract the minutes 23 – 18 = 5 minutes, write 5 within the minutes column

Due to this fact, 24 minutes 15 seconds – 18 minutes 29 seconds = 5 minutes 46 seconds

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

Answer:

$Time Addition and Subtraction$

Subtract the months first

We borrow and subtract 1 12 months, 16 – 6 = 9 months

Kind 9 within the Months column and now subtract 7 – 7 = 0

Kind 0 within the Years column.

So 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 = quarter-hour

Step II: Subtract the hours.

8 – 6 = 2 hours

$Subtraction of Hours and Minutes$

Reply: 2 hours quarter-hour

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

$Subtract Hours and Minutes$

Reply: 1 hour 55 minutes

Step I: We will not subtract 50 minutes from 45 minutes.

So borrow 1 hour from 12 hours.

1 hour = 60 minutes

60 + 45 = 105 minutes

Step II: Subtract the minutes.

105 – 50 = 55 minutes

Write 55 below the minute.

Step III: 12 – 1 = 11 hours left as hours

Step IV: Subtract the hours.

11 – 10 = 1 hour

Step V: Write 1 below the clock.

Time Addition and Subtraction Questions and Solutions:

I. Add the next.

one.	Hour	Minute
	30	20
+	20	05

2.	Hour	Minute
	45	48
+	10	12

3.	day	Hour
	33	20
+	45	14
+	50	16

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

5.	Hour	Minute	second
	17	42	30
+	12	36	20
+	15	50	50

6.	12 months	months
	56	10
+	43	05
+	17	eleventh

II: Take away the next.

one.	Hour	Minute	second
	16	30	20
–	15	20	50

2.	Hour	Minute	second
	13	23	43
–	10	22	32

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4th Grade Math Actions

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