Adding and Subtracting Time worksheet - Free Printable

Let's solve each problem step by step, starting with adding hours and minutes, then moving on to subtracting.

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✔ Adding Hours and Minutes

We add the hours and minutes separately. If the total minutes exceed 60, we convert 60 minutes into 1 hour.

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#### 1. 2 h 15 min + 5 h 30 min

- Add hours: 2 h + 5 h = 7 h
- Add minutes: 15 min + 30 min = 45 min
- Total: 7 h 45 min

✔ Answer: 7 h 45 min

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#### 2. 1 h 45 min + 2 h 10 min

- Add hours: 1 h + 2 h = 3 h
- Add minutes: 45 min + 10 min = 55 min
- Total: 3 h 55 min

✔ Answer: 3 h 55 min

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#### 3. 3 h 40 min + 1 h 50 min

- Add hours: 3 h + 1 h = 4 h
- Add minutes: 40 min + 50 min = 90 min
- But 90 min = 1 h 30 min
- So total: 4 h + 1 h 30 min = 5 h 30 min

✔ Answer: 5 h 30 min

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#### 4. 5 h 40 min + 3 h 40 min

- Add hours: 5 h + 3 h = 8 h
- Add minutes: 40 min + 40 min = 80 min
- 80 min = 1 h 20 min
- So total: 8 h + 1 h 20 min = 9 h 20 min

✔ Answer: 9 h 20 min

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#### 5. 6 h 15 min + 2 h 45 min

- Add hours: 6 h + 2 h = 8 h
- Add minutes: 15 min + 45 min = 60 min = 1 h
- So total: 8 h + 1 h = 9 h 0 min

✔ Answer: 9 h 0 min or 9 h

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✔ Subtracting Hours and Minutes

When subtracting, if the minutes in the first time are less than the second, borrow 1 hour (60 minutes) from the hours.

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#### 1. 12 h 15 min - 4 h 30 min

- Can't subtract 30 min from 15 min → borrow 1 hour
- Convert 12 h 15 min → 11 h 75 min (since 1 h = 60 min → 15 + 60 = 75)
- Now subtract:
- Hours: 11 h - 4 h = 7 h
- Minutes: 75 min - 30 min = 45 min
- Total: 7 h 45 min

✔ Answer: 7 h 45 min

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#### 2. 11 h 45 min - 2 h 10 min

- Subtract hours: 11 h - 2 h = 9 h
- Subtract minutes: 45 min - 10 min = 35 min
- Total: 9 h 35 min

✔ Answer: 9 h 35 min

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#### 3. 8 h 40 min - 3 h 50 min

- Can't subtract 50 min from 40 min → borrow 1 hour
- Convert 8 h 40 min → 7 h 100 min (40 + 60 = 100)
- Now subtract:
- Hours: 7 h - 3 h = 4 h
- Minutes: 100 min - 50 min = 50 min
- Total: 4 h 50 min

✔ Answer: 4 h 50 min

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#### 4. 9 h 10 min - 5 h 30 min

- Can't subtract 30 min from 10 min → borrow 1 hour
- Convert 9 h 10 min → 8 h 70 min (10 + 60 = 70)
- Now subtract:
- Hours: 8 h - 5 h = 3 h
- Minutes: 70 min - 30 min = 40 min
- Total: 3 h 40 min

✔ Answer: 3 h 40 min

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#### 5. 7 h 15 min + 1 h 45 min

Wait! This is addition, but it's in the subtraction section. Let's check:

> It says: "Subtract the hours and minutes." But this one is written as +.

Possibly a typo. But based on the operation, we'll treat it as addition.

So: 7 h 15 min + 1 h 45 min

- Hours: 7 h + 1 h = 8 h
- Minutes: 15 min + 45 min = 60 min = 1 h
- Total: 8 h + 1 h = 9 h 0 min

✔ Answer: 9 h 0 min or 9 h

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✔ Final Answers:

#### Addition:
1. 7 h 45 min
2. 3 h 55 min
3. 5 h 30 min
4. 9 h 20 min
5. 9 h 0 min

#### Subtraction:
1. 7 h 45 min
2. 9 h 35 min
3. 4 h 50 min
4. 3 h 40 min
5. 9 h 0 min (Note: This was listed under subtraction but is an addition — likely a mistake)

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📝 Summary:

The last problem in the subtraction section appears to be incorrectly labeled — it should be addition. All others follow standard rules for adding and subtracting time.

Let me know if you'd like this formatted as a printable worksheet!