Add and Subtract Time Worksheets - Free Printable

Let's solve each part of the worksheet step by step and explain the reasoning.

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1) Add on the minutes to each of these times:

We will add the given minutes to each time. Remember that 60 minutes = 1 hour, so if adding minutes exceeds 60, we convert the excess into hours.

a) 3:20pm + 30 mins →
3:20 + 30 = 3:50pm
✔ Answer: 3:50pm

b) 6:45pm + 15 mins →
6:45 + 15 = 7:00pm (since 45 + 15 = 60 → 1 hour)
✔ Answer: 7:00pm

c) 8:15am + 25 mins →
8:15 + 25 = 8:40am
✔ Answer: 8:40am

d) 2:50pm + 40 mins →
2:50 + 40 = 3:30pm (50 + 40 = 90 → 90 - 60 = 30 minutes, carry over 1 hour)
✔ Answer: 3:30pm

e) 11:35am + 50 mins →
11:35 + 50 = 12:25pm (35 + 50 = 85 → 85 - 60 = 25 minutes, carry over 1 hour → 11 + 1 = 12)
✔ Answer: 12:25pm

f) 7:40am + 35 mins →
7:40 + 35 = 8:15am (40 + 35 = 75 → 75 - 60 = 15 minutes, carry over 1 hour)
✔ Answer: 8:15am

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2) Subtract the minutes from each of these times:

Subtracting minutes may require borrowing 1 hour (60 minutes) from the hour.

a) 10:40am – 20 mins →
10:40 - 20 = 10:20am
✔ Answer: 10:20am

b) 2:50pm – 15 mins →
2:50 - 15 = 2:35pm
✔ Answer: 2:35pm

c) 10:20pm – 30 mins →
10:20 - 30 → Can't subtract 30 from 20, so borrow 1 hour:
10:20 = 9:80pm (since 1 hour = 60 minutes)
9:80 - 30 = 9:50pm
✔ Answer: 9:50pm

d) 9:10am – 25 mins →
9:10 - 25 → Borrow 1 hour: 9:10 = 8:70am
8:70 - 25 = 8:45am
✔ Answer: 8:45am

e) 12:15pm – 40 mins →
12:15 - 40 → Borrow 1 hour: 12:15 = 11:75pm
11:75 - 40 = 11:35am
✔ Answer: 11:35am

f) 1:35pm – 50 mins →
1:35 - 50 → Borrow 1 hour: 1:35 = 12:95pm
12:95 - 50 = 12:45pm
✔ Answer: 12:45pm

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3) Work out how long the time interval is:

We calculate the difference between two times.

a) 3:25pm to 3:45pm →
3:45 - 3:25 = 20 minutes
✔ Answer: 20 minutes (already given)

b) 4:30pm to 5:10pm →
From 4:30 to 5:00 = 30 minutes
From 5:00 to 5:10 = 10 minutes
Total = 30 + 10 = 40 minutes
✔ Answer: 40 minutes

c) 10:25am to 11:00am →
From 10:25 to 11:00 = 35 minutes
✔ Answer: 35 minutes

d) 12:50pm to 1:15pm →
From 12:50 to 1:00 = 10 minutes
From 1:00 to 1:15 = 15 minutes
Total = 10 + 15 = 25 minutes
✔ Answer: 25 minutes

e) 7:25pm to 8:05pm →
From 7:25 to 8:00 = 35 minutes
From 8:00 to 8:05 = 5 minutes
Total = 35 + 5 = 40 minutes
✔ Answer: 40 minutes

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4) Write in the missing time:

a) 25 minutes earlier than 9:40am →
9:40 - 25 = 9:15am
✔ Answer: 9:15am

b) 30 minutes later than 7:35pm →
7:35 + 30 = 8:05pm
✔ Answer: 8:05pm

c) 15 minutes later than 11:40am →
11:40 + 15 = 11:55am
✔ Answer: 11:55am

d) 25 minutes earlier than 1:10pm →
1:10 - 25 → Borrow: 1:10 = 12:70pm
12:70 - 25 = 12:45pm
✔ Answer: 12:45pm

e) 50 minutes earlier than 10:25am →
10:25 - 50 → Borrow: 10:25 = 9:85am
9:85 - 50 = 9:35am
✔ Answer: 9:35am

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✔ Final Answers:

#### 1)
a) 3:50pm
b) 7:00pm
c) 8:40am
d) 3:30pm
e) 12:25pm
f) 8:15am

#### 2)
a) 10:20am
b) 2:35pm
c) 9:50pm
d) 8:45am
e) 11:35am
f) 12:45pm

#### 3)
a) 20 minutes
b) 40 minutes
c) 35 minutes
d) 25 minutes
e) 40 minutes

#### 4)
a) 9:15am
b) 8:05pm
c) 11:55am
d) 12:45pm
e) 9:35am

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