Practice questions available in **McGraw Hill Math Grade 6 Answer Key PDF** **Lesson 18.7 Time **will engage students and is a great way of informal assessment.

## McGraw-Hill Math Grade 6 Answer Key Lesson 18.7 Time

**Exercises
**

**SOLVE**

Question 1.

24 hours = ____________ seconds

Answer:

24 hours = 1,440 seconds.

Explanation:

24 hours = ?? seconds

Conversion:

1 hour = 60 seconds.

24 hours = 60 × 24

= 1,440 seconds.

Question 2.

35 days = ____________ hours

Answer:

35 days = 840 hours.

Explanation:

35 days = ?? hours.

Conversion:

1 day = 24 hours.

35 days = 24 × 35

= 840 hours.

Question 3.

365 days = ____________ minutes

Answer:

365 days = 525,600 minutes.

Explanation:

365 days = ?? minutes.

Conversion:

1 day = 1,440 minutes.

365 days = 1,440 × 365

= 525,600 minutes.

Question 4.

12 hours = ____________ days

Answer:

12 hours = 0.5 day or half a day.

Explanation:

12 hours = ?? days.

Conversion:

1 day = 24 hours.

12 hours = 12 ÷ 24

= 0.5 day or half a day.

Question 5.

52 weeks = ____________ days

Answer:

52 weeks = 364 days.

Explanation:

52 weeks = ?? days.

Conversion:

1 week = 7 days.

52 weeks = 7 × 52

= 364 days.

Question 6.

51 hours = ____________ minutes

Answer:

51 hours = 3,060 minutes.

Explanation:

51 hours = ?? minutes.

Conversion:

1 hour = 60 minutes.

51 hours = 60 × 51

= 3,060 minutes.

Question 7.

24 days = ____________ weeks

Answer:

24 days = 3.4 weeks.

Explanation:

24 days = ?? weeks.

Conversion:

1 week = 7 days.

24 days = 24 ÷ 7

= 3.4 weeks.

Question 8.

200 years = ____________ decades

Answer:

200 years = 20 decades.

Explanation:

200 years = ?? decades.

Conversion:

1 decade = 10 years.

200 years = 200 ÷ 10

= 20 decades.

Question 9.

3,000 years = ____________ centuries

Answer:

3,000 years = 30 centuries.

Explanation:

3,000 years = ?? centuries.

Conversion:

1 century = 100 years.

3,000 years = 3,000 ÷ 100

= 30 centuries

Question 10.

42 days = ____________ minutes

Answer:

42 days = 60,480 minutes

Explanation:

42 days = ?? minutes

Conversion:

1 day = 1,440 minutes.

42 days = 1,440 × 42

= 60,480 minutes

Question 11.

2 weeks = ____________ seconds

Answer:

2 weeks = 12,09,600 seconds

Explanation:

2 weeks = ?? seconds

Conversion:

1 week = 604,800 seconds.

2 weeks = 604,800 × 2

= 12,09,600 seconds

Question 12.

45 minutes = ____________ hours

Answer:

45 minutes = 0.75 hours.

Explanation:

45 minutes = ?? hours.

Conversion:

1 hour = 60 minutes.

45 minutes = 45 ÷ 60

= 0.75 hours.

Question 13.

If you got paid $800 and you worked 2.92 days, approximately how much did you make per hour?

Answer:

Amount paid per day = $11.42.

Explanation:

Amount paid = $800.

Number of days = 2.92.

Amount paid per day = Amount paid ÷ Number of days

= $800 ÷ 2.92

= $273.97.

Conversion:

1 day = 24 hours.

Amount paid per day = Amount paid per day ÷ 24

= $273.97 ÷ 24

= $11.42.

Question 14.

How much do you have to pay a rock band that will play for 2 hours and wants to be paid $15/ second?

Answer:

Amount paid for 2 hours = $108,000.

Explanation:

Number of hours = 2.

Amount paid per second = $15.

Conversion:

1 hour = 3,600 seconds.

2 hours = 3,600 × 2

= 7,200 seconds.

=> Amount paid for 2 hours = Amount paid per second × 7,200

= $15 × 7,200

= $108,000.

Question 15.

3 decades = _____________ hours

Assume 365 days per year.

Answer:

3 decades = 262,800 hours.

Explanation:

Conversion:

1 year = 365 days.

1 day = 24 hours.

=> 1 year = 365 × 24

= 8,760 hours.

1 decade = 10 years.

= 10 × 8760 hours

= 87,600 hours.

3 decades = 87,600 × 3

= 262,800 hours.

Question 16.

A man tells you he is 2,270,592,000 seconds old. How many years old is he if you assume 365 days per year?

Answer:

Number of years old a man is = 72.

Explanation:

Number of seconds old a man is = 2,270,592,000.

Conversion:

1 year = 365 days.

1 day = 24 hours.

=> 1 year = 365 × 24

=> 8,760 hours.

1 hour = 3,600 seconds.

8,760 hours = 8,760 × 3600

= 3,15,36,000 seconds.

Number of years old a man is = Number of seconds old a man is ÷ 3,15,36,000 seconds

= 2,270,592,000 ÷ 3,15,36,000 seconds

= 72.