To solve these problems, we need to remember the relationship between hours and days:
1 day = 24 hours
* To change
days into hours, we
multiply by 24.
* To change
hours into days, we
divide by 24.
Here is the step-by-step solution for each problem:
Left Column:
1.
3 days = \_\_\_\_\_ hour
* Calculation: $3 \times 24$
* $3 \times 20 = 60$ and $3 \times 4 = 12$.
* $60 + 12 = 72$
* Answer:
72
2.
240 hours = \_\_\_\_\_ day
* Calculation: $240 \div 24$
* Since $24 \times 10 = 240$, the answer is 10.
* Answer:
10
3.
6 days = \_\_\_\_\_ hour
* Calculation: $6 \times 24$
* $6 \times 20 = 120$ and $6 \times 4 = 24$.
* $120 + 24 = 144$
* Answer:
144
4.
288 hours = \_\_\_\_\_ day
* Calculation: $288 \div 24$
* Let's estimate: $24 \times 10 = 240$.
* Remaining: $288 - 240 = 48$.
* $24 \times 2 = 48$.
* Total: $10 + 2 = 12$.
* Answer:
12
5.
7 days = \_\_\_\_\_ hour
* Calculation: $7 \times 24$
* $7 \times 20 = 140$ and $7 \times 4 = 28$.
* $140 + 28 = 168$
* Answer:
168
6.
264 hours = \_\_\_\_\_ day
* Calculation: $264 \div 24$
* We know $24 \times 10 = 240$.
* Remaining: $264 - 240 = 24$.
* $24 \times 1 = 24$.
* Total: $10 + 1 = 11$.
* Answer:
11
7.
11 days = \_\_\_\_\_ hour
* Calculation: $11 \times 24$
* An easy trick for multiplying by 11: separate the digits of 24 (2 and 4) and put their sum (6) in the middle.
* Or: $10 \times 24 = 240$ plus $1 \times 24 = 24$.
* $240 + 24 = 264$.
* Answer:
264
Right Column:
8.
336 hours = \_\_\_\_\_ day
* Calculation: $336 \div 24$
* $24 \times 10 = 240$.
* Remaining: $336 - 240 = 96$.
* How many 24s in 96? $24 \times 4 = 96$.
* Total: $10 + 4 = 14$.
* Answer:
14
9.
13 days = \_\_\_\_\_ hour
* Calculation: $13 \times 24$
* $10 \times 24 = 240$.
* $3 \times 24 = 72$.
* $240 + 72 = 312$.
* Answer:
312
10.
312 hours = \_\_\_\_\_ day
* Calculation: $312 \div 24$
* From the previous problem, we know $13 \times 24 = 312$.
* So, $312 \div 24 = 13$.
* Answer:
13
11.
14 days = \_\_\_\_\_ hour
* Calculation: $14 \times 24$
* $10 \times 24 = 240$.
* $4 \times 24 = 96$.
* $240 + 96 = 336$.
* Answer:
336
12.
192 hours = \_\_\_\_\_ day
* Calculation: $192 \div 24$
* Let's try 8. $8 \times 20 = 160$ and $8 \times 4 = 32$.
* $160 + 32 = 192$. It matches.
* Answer:
8
13.
15 days = \_\_\_\_\_ hour
* Calculation: $15 \times 24$
* $10 \times 24 = 240$.
* $5 \times 24 = 120$ (half of 240).
* $240 + 120 = 360$.
* Answer:
360
14.
216 hours = \_\_\_\_\_ day
* Calculation: $216 \div 24$
* Let's try 9. $9 \times 20 = 180$ and $9 \times 4 = 36$.
* $180 + 36 = 216$. It matches.
* Answer:
9
Final Answer:
3 days =
72 hour
336 hours =
14 day
240 hours =
10 day
13 days =
312 hour
6 days =
144 hour
312 hours =
13 day
288 hours =
12 day
14 days =
336 hour
7 days =
168 hour
192 hours =
8 day
264 hours =
11 day
15 days =
360 hour
11 days =
264 hour
216 hours =
9 day
Parent Tip: Review the logic above to help your child master the concept of time conversion worksheet grade.
