Convert time between hours and minutes with this Grade 3 math worksheet.

Let’s solve each problem step by step.

We know:
- 1 hour = 60 minutes
- To convert hours to minutes → multiply by 60
- To convert minutes to hours → divide by 60 (and write as a decimal or mixed number if needed)

---

1. 60 min = ___ hr
60 ÷ 60 = 1 → 1 hr

2. 1 hr = ___ min
1 × 60 = 60 → 60 min

3. 3 hr = ___ min
3 × 60 = 180 → 180 min

4. 240 min = ___ hr
240 ÷ 60 = 4 → 4 hr

5. 5 hr = ___ min
5 × 60 = 300 → 300 min

6. 90 min = ___ hr
90 ÷ 60 = 1.5 → 1.5 hr (or 1 and a half hours)

7. 12 hr = ___ min
12 × 60 = 720 → 720 min

8. 330 min = ___ hr
330 ÷ 60 = 5.5 → 5.5 hr (or 5 and a half hours)

9. 615 min = ___ hr
615 ÷ 60 = 10.25 → 10.25 hr
*(Check: 10 × 60 = 600, plus 15 min = 0.25 hr → yes, correct)*

10. 79 min = ___ hr
79 ÷ 60 ≈ 1.316... but let’s keep it exact:
79 ÷ 60 = 1 and 19/60 → as decimal: ≈1.3167 hr, but for Grade 3, maybe they want fraction?
Wait — looking at other answers, they used decimals like 1.5, 5.5, 10.25 — so we’ll use decimal.

But 79 ÷ 60 = 1.31666… — that’s messy. Maybe they expect rounding? But no — let’s check: perhaps leave as improper fraction? No, worksheet uses decimals.

Actually, 79 ÷ 60 = 1.316... but in context of Grade 3, maybe they just want the division result rounded to two decimals? Or perhaps I made a mistake?

Wait — let me recalculate:

60 min = 1 hr
So 79 min = 1 hr + 19 min
19 min = 19/60 hr ≈ 0.3167 hr → total ≈ 1.32 hr? But earlier problems used exact decimals like 1.5, 5.5, 10.25 — which are exact fractions.

10.25 is 41/4 — wait no, 10.25 = 41/4? No, 10.25 = 41/4 is wrong — 10.25 = 41/4? 41÷4=10.25 yes — but 615÷60=10.25 exactly because 615÷60=123÷12=41÷4=10.25.

But 79÷60 is not a nice decimal. Let me double-check the problem — maybe it’s 78 min? No, image says 79 min.

Perhaps for Grade 3, they accept fractional form? But the worksheet has blanks with “hr” and “min”, and previous answers are decimals.

Looking back: #6 is 90 min = 1.5 hr — that’s fine. #8 is 330 min = 5.5 hr — also fine. #9 is 615 min = 10.25 hr — also exact.

79 min: 79 ÷ 60 = 1.31666... — this is repeating. Maybe they want it as a mixed number? But the blank says “___ hr”, implying decimal.

Perhaps I should calculate it as 1.32 hr? But that’s approximate.

Wait — let’s see if there’s a pattern. All others are exact when divided by 60? Let’s list:

60÷60=1
240÷60=4
90÷60=1.5
330÷60=5.5
615÷60=10.25 — all exact decimals.

79÷60 is not exact. Did I misread? Image says “79 min = ___ hr”

Perhaps it’s a typo? Or maybe for Grade 3, they allow approximation? But better to be precise.

Another thought: maybe they want it as a fraction? But the format doesn’t suggest that.

Looking at the worksheet again — all answers so far are whole numbers or .5 or .25 — so 79 might be intended to be 78 or 80? But it’s written as 79.

Perhaps I should do 79 ÷ 60 = 1.3167, but round to two decimals? 1.32 hr? But that’s not accurate.

Wait — let’s calculate exactly: 79/60 = 1 19/60 hr. As decimal, it’s approximately 1.3167, but since other answers are exact, maybe this one is meant to be left as is? But the blank expects a number.

Perhaps I made a mistake in #9? 615 ÷ 60: 60*10=600, remainder 15, 15/60=0.25, so 10.25 — correct.

For 79: 60*1=60, remainder 19, 19/60=0.3166..., so 1.3166... hr.

But in educational contexts for Grade 3, sometimes they avoid such decimals. Perhaps the problem is 78 min? 78÷60=1.3 hr? Or 80 min=1.333? Still not nice.

Another idea: maybe they want the answer as "1 hr 19 min" but the blank says "___ hr", so probably not.

Looking at the worksheet structure, all conversions are to single unit: either all to hr or all to min, and the blank is for the numerical value with unit specified.

For consistency, I'll calculate 79 ÷ 60 = 1.3167, but since it's Grade 3, perhaps they expect rounding to nearest tenth? 1.3 hr? But 19/60 is about 0.3167, which rounds to 0.3, so 1.3 hr.

But let's check online or standard practice — actually, in many worksheets, they use exact values, and 79 is odd.

Perhaps it's 75 min? 75÷60=1.25 — nice. But image says 79.

I think I have to go with the calculation. So 79 ÷ 60 = 1.31666... — but for practical purposes, in Grade 3, they might accept 1.32 or 1.3, but to be accurate, I'll use the exact decimal representation as per calculator.

But let's see the last one: 45 min = ? hr — 45÷60=0.75 — nice.

So for 79, it's not nice. Perhaps it's a test of understanding that not all are neat.

I'll calculate it as 1.3167, but since the worksheet likely expects a simple answer, and given that 79 is close to 78 or 80, but I think I should do exact division.

Another thought: perhaps they want it as a mixed number, but the blank is for "___ hr", so decimal is expected.

Let me proceed with 79 ÷ 60 = 1.3167, but I'll round to two decimals as common in such contexts: 1.32 hr? But 1.3167 rounded to two decimals is 1.32.

However, in math, we usually don't round unless specified. But for Grade 3, perhaps they do.

Let's look at the other problems — all are exact except possibly this one. #9 is 615, which is exact 10.25.

Perhaps 79 is a mistake, but I have to solve it as is.

I recall that in some curricula, they teach to express as decimal up to two places.

So 79 ÷ 60 = 1.3166... ≈ 1.32 hr.

But let's calculate precisely: 79 / 60 = 79 ÷ 60.

Do the division: 60 into 79 is 1, remainder 19. 19.0 divided by 60 is 0.3166..., so 1.3166... hr.

To two decimal places, it's 1.32 hr (since 6>5, round up 1 to 2).

1.3166... the third decimal is 6, so yes, round up the second decimal from 1 to 2? Wait: 1.3166 — first decimal 3, second 1, third 6 — so 1.32 when rounded to two decimals.

Yes.

But let's confirm with another approach: 79 min / 60 = 79/60 = 1 + 19/60. 19/60 = 0.3166..., so 1.3166... hr.

Rounded to two decimal places: look at the third digit, which is 6 ≥ 5, so round up the second digit: 1.32 hr.

Okay, I'll go with that.

11. 24 hr = ___ min
24 × 60 = 1440 → 1440 min

12. 45 min = ___ hr
45 ÷ 60 = 0.75 → 0.75 hr

Now, summarizing all answers:

1. 1
2. 60
3. 180
4. 4
5. 300
6. 1.5
7. 720
8. 5.5
9. 10.25
10. 1.32 (rounded) — but wait, is rounding appropriate? Let me double-check if 79 is correct.

Upon second thought, in many Grade 3 worksheets, they avoid such decimals, and perhaps it's 78 min or 80 min, but since the image shows 79, I'll assume it's intentional.

Maybe they want the exact fraction, but the format doesn't allow it.

Another idea: perhaps for 79 min, they expect "1 hr 19 min" but the blank is for "___ hr", so no.

I think I have to go with 1.32 hr for practicality.

But let's see the answer key logic — all others are exact, so perhaps 79 is a typo, but I'll calculate as is.

To be precise, I'll use 79/60 = 1.3167, but for the answer, I'll put 1.32 as rounded.

However, in the context of the worksheet, since 90 min = 1.5, 330 min = 5.5, etc., they are using exact decimals, so for 79, it should be left as is, but that's not possible.

Perhaps they want it as 1.3 hr if rounded to tenths.

Let's check the level: Grade 3. In Grade 3, they might not do decimals beyond tenths.

For example, 90 min = 1.5 hr — that's tenths.

330 min = 5.5 hr — tenths.

615 min = 10.25 hr — hundredths, so they do hundredths.

10.25 is hundredths, so for 79, they might expect 1.32.

79 ÷ 60 = 1.3166... which to hundredths is 1.32.

Yes.

So I'll use 1.32.

Final Answer:

1. 1
2. 60
3. 180
4. 4
5. 300
6. 1.5
7. 720
8. 5.5
9. 10.25
10. 1.32
11. 1440
12. 0.75

But let's write them in order as per the worksheet.

The worksheet has:

1. 60 min = __ hr → 1
2. 1 hr = __ min → 60
3. 3 hr = __ min → 180
4. 240 min = __ hr → 4
5. 5 hr = __ min → 300
6. 90 min = __ hr → 1.5
7. 12 hr = __ min → 720
8. 330 min = __ hr → 5.5
9. 615 min = __ hr → 10.25
10. 79 min = __ hr → 1.32
11. 24 hr = __ min → 1440
12. 45 min = __ hr → 0.75

For #10, to be more accurate, perhaps they expect the exact value, but since it's a worksheet, and other answers are decimals, I'll stick with 1.32.

Some might argue for 1.3, but 1.32 is better for hundredths.

Let's calculate 79 ÷ 60 exactly: 79/60 = 1.31666... so if we round to two decimal places, it's 1.32.

Yes.

So final answers are as above.

Final Answer:
1. 1
2. 60
3. 180
4. 4
5. 300
6. 1.5
7. 720
8. 5.5
9. 10.25
10. 1.32
11. 1440
12. 0.75