Time Currency And Conversions

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Time Conversions

1 day = 24 hours, 1 hour = 60 minutes, 1 minute = 60 seconds.
To convert days to hours, multiply by 24 (e.g., 3 days = 72 hours).
To convert hours to minutes, multiply by 60; minutes to seconds, multiply by 60.
For reverse conversions, divide by the appropriate factor.

12-Hour and 24-Hour Clocks

12-hour clock uses AM (midnight to midday) and PM (midday to midnight).
24-hour clock runs from 00:00 (midnight) to 23:59; no AM/PM needed.
To convert 12-hour PM to 24-hour, add 12 to the hour (e.g., 3:25pm = 15:25).
12:00am = 00:00, 12:00pm = 12:00.
On an analogue clock, the short hand is the hour hand and the long hand is the minute hand; each number represents 5 minutes for the minute hand.

Reading time from an analogue clock

Calculating with Time

Work in chunks: add minutes to next hour, then whole hours, then remaining minutes.
When crossing AM/PM, remember that 12:00pm is midday and 12:00am is midnight.
For time intervals, subtract start from end, using chunking or conversion to minutes.
Example: 07:35 to 08:14 is 25 min + 14 min = 39 min.

Bus and Train Timetables

Timetables typically use 24-hour clock; times are four digits without colon.
Each column represents a different service; times are usually departure times.
To find journey duration, subtract departure time from arrival time for the same service.
Example: 0800 at Coronation Street to 0840 at Ramsey Street = 40 minutes.

Bus timetable

Time Zones

Time zones differ by hours; some locations are ahead, others behind.
To convert, add or subtract the time difference depending on direction.
If a location is behind, subtract hours; if ahead, add hours.
Example: Madrid is 7 hours ahead of Chicago; 17:15 Madrid = 10:15 Chicago.

Exchange Rates

Exchange rate shows how much one currency is worth in another.
To convert from currency A to B, multiply amount in A by the rate (A to B).
To convert from B to A, divide amount in B by the rate (A to B).
Example: $1 = 0.8626 euros; $650 × 0.8626 = €560.69.

Converting Units of Length, Mass, Capacity

Length: 1 cm = 10 mm, 1 m = 100 cm, 1 km = 1000 m.
Mass: 1 g = 1000 mg, 1 kg = 1000 g, 1 tonne = 1000 kg.
Capacity: 1 litre = 1000 ml, 1 ml = 1 cm³.
To convert, multiply or divide by powers of 10; e.g., 5.3 km = 5300 m.

Squared and Cubic Units

For area, square the linear conversion: 1 m² = 100 cm × 100 cm = 10 000 cm².
For volume, cube the linear conversion: 1 m³ = 100 cm × 100 cm × 100 cm = 1 000 000 cm³.
1 cm² = 100 mm², 1 km² = 1 000 000 m².
1 cm³ = 1000 mm³, 1 km³ = 1 000 000 000 m³.

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Câu hỏi luyện tập

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1.How many hours are there in 3 days?
Easy
- A36 hours
- B48 hours
- C72 hours
- D24 hours
2.Change 5.3 kilometres into metres.
Easy
- A530 m
- B5300 m
- C53 m
- D0.53 m
3.Write 3.25 pm in the 24-hour clock.
Easy
- A03:25
- B15:25
- C13:25
- D3:25
4.Change 4.6 metres to centimetres.
Easy
- A460 cm
- B46 cm
- C0.046 cm
- D4600 cm
5.Change 560 metres into kilometres.
Easy
- A5.6 km
- B0.56 km
- C56 km
- D560000 km
6.Change 3670 centimetres to metres.
Easy
- A36.7 m
- B367 m
- C3.67 m
- D0.367 m
7.Change 4365 metres into centimetres.
Easy
- A43.65 cm
- B436500 cm
- C436.5 cm
- D4.365 cm
8.Change 645 mm into cm.
Easy
- A6.45 cm
- B64.5 cm
- C6450 cm
- D0.645 cm

Thêm câu hỏi

9.Change 4.37 litres into cubic centimetres.
Easy
- A437 cm³
- B4370 cm³
- C43700 cm³
- D0.437 cm³
10.Sean buys a Chinese pot costing 1200 yuan. The exchange rate is $1 = 6.4 yuan. Work out the cost in dollars.
Medium
- A$187.50
- B$192.00
- C$7680
- D$7.68
11.A café is open Monday to Friday 8 am to 6 pm, Saturday 9:30 am to 3 pm, and closed Sunday. Work out the total number of hours open in one week.
Medium
- A50 hours
- B55.5 hours
- C60 hours
- D55 hours
12.A train from Woodton to Northley takes 6 hours 25 minutes. It leaves Woodton at 19:46. Work out the arrival time.
Medium
- A01:11
- B02:11
- C26:11
- D13:11
13.Work out the time 7 hours and 36 minutes before 13:26.
Medium
- A05:50
- B06:50
- C05:10
- D20:50
14.A museum is open Monday to Friday 09:00 to 17:00, Saturday and Sunday 10:00 to 16:00. During opening hours, the museum has 4 security guards working. Each guard works a maximum of 30 hours each week. Work out the smallest number of guards needed each week.
Hard
- A4
- B5
- C6
- D7
15.Diego flies from Madrid to Buenos Aires. His flight leaves at 20:55 and arrives at 03:50 local time. The local time in Buenos Aires is 5 hours behind the local time in Madrid. Work out, in hours and minutes, the flight time.
Hard
- A6 h 55 min
- B7 h 55 min
- C11 h 55 min
- D5 h 55 min
16.A chef buys cheese from France. 200g of cheese costs 3.45 euros. The exchange rate is $1 = 0.84 euros. Work out the maximum mass of cheese the chef can buy with $150. Give your answer in kilograms, correct to 1 decimal place.
Hard
- A29.0 kg
- B73.2 kg
- C36.6 kg
- D7.3 kg
17.Change 8254 mm² into cm².
Easy
- A82.54 cm²
- B825.4 cm²
- C8.254 cm²
- D0.8254 cm²
18.Convert 2.54 m³ into cm³.
Easy
- A2 540 000 cm³
- B254 000 cm³
- C25 400 cm³
- D2540 cm³
19.Change 485 g into kg.
Easy
- A0.485 kg
- B4.85 kg
- C48.5 kg
- D0.0485 kg
20.A film starts at 15 35 and lasts for 1 hour 45 minutes. What time does it end?
Easy
- A17 20
- B17 10
- C16 20
- D16 10
21.Convert 12 300 cm into km.
Easy
- A0.123 km
- B1.23 km
- C12.3 km
- D123 km
22.On a particular day, 1 US Dollar = 155.62 Japanese Yen and 1 Australian Dollar = 102.09 Japanese Yen. An item costs 40 US Dollars. Find its cost in Australian Dollars.
Medium
- A60.97 AUD
- B61.00 AUD
- C60.50 AUD
- D61.50 AUD
23.A train journey started at 11.23 am and finished at 2.27 pm. How long was the journey?
Medium
- A3 hours 4 minutes
- B2 hours 4 minutes
- C3 hours 56 minutes
- D2 hours 56 minutes
24.The time in Madrid is 7 hours ahead of the time in Chicago. Mark takes a flight from Madrid to Chicago which lasts 9 hours and 45 minutes. The flight leaves at 7:30 am Madrid time. What is the local time in Chicago when he arrives?
Hard
- A10:15 am
- B10:15 pm
- C5:15 am
- D5:15 pm
25.Ivy changes $650 into euros. The exchange rate is $1 = 0.8626 euros. How many euros does she receive?
Easy
- A560.69 euros
- B753.50 euros
- C650.00 euros
26.A machine always takes 5 minutes to paint an 80 metre white line on a road. How many metres are painted in 45 minutes?
Easy
- A720 m
- B7200 m
- C7.2 m
- D72 m
27.A shop is open for 6 days each week. On each day, the shop is open from 09 30 until 13 00 and from 14 15 until 20 30. Work out the total number of hours the shop is open in one week.
Medium
- A58.5 hours
- B59 hours
- C60 hours
- D57.5 hours
28.A tourist changes $500 to euros (€) when the exchange rate is €1 = $1.0697. How many euros does he receive?
Easy
- A467.43 €
- B534.85 €
- C500.00 €
29.Oliver buys a game console for 49980 JPY. The exchange rate is £1 = 195 JPY. Work out the cost in pounds, rounded to the nearest pound.
Medium
- A£256
- B£257
- C£255
- D£258
30.The total area of Yemen is 455 500 000 000 m². Find the area in km², rounded to 3 significant figures.
Medium
- A456 000 km²
- B455 000 km²
- C455 500 km²
31.A bus leaves Town Hall at 10:55 and arrives at Kingswood Park at 11:50. How many minutes does the journey take?
Easy
- A55 minutes
- B45 minutes
- C65 minutes
- D50 minutes
32.A film starts at 15:35 and lasts for 1 hour 45 minutes. What time does it end?
Easy
- A17:20
- B17:10
- C16:20
- D16:10
33.How many minutes are there in 5 hours?
Easy
- A300 minutes
- B500 minutes
- C50 minutes
- D150 minutes
34.What is 2.7 metres in centimetres?
Easy
- A27 cm
- B270 cm
- C2700 cm
- D0.27 cm
35.How many minutes are there in 3 hours?
Easy
- A180
- B300
- C150
- D120
36.12:00 pm is midday.
Easy
True or false?
37.A film starts at 14:40 and ends at 16:25. How long does the film last?
Easy
- A1 hour 45 minutes
- B2 hours 15 minutes
- C1 hour 55 minutes
- D2 hours 5 minutes
38.Which of the following are equivalent to 1 litre? (Select all that apply)
Medium
- A1000 cm³
- B100 cl
- C1000 ml
- D10 ml
- E1 m³
39.Match each 12-hour clock time to its 24-hour clock equivalent.
Medium
- 8:15 am
- 8:15 pm
- 12:00 pm
- 08:15
- 20:15
- 12:00
40.Arrange these times in order, starting with the earliest: 14:30, 2:15 pm, 11:45 am, 00:15.
Medium
- 00:15
- 11:45 am
- 14:30
- 2:15 pm
41.Convert 0.005 km³ into m³.
Medium
- A5 000 000 m³
- B5 000 m³
- C5 000 000 000 m³
- D5 000 000 000 000 m³
42.Match each 24-hour clock time to its 12-hour clock equivalent.
Medium
- 07:30
- 14:15
- 23:45
- 00:05
- 7:30 am
- 2:15 pm
- 11:45 pm
- 12:05 am
43.Arrange these times in order, starting with the earliest.
Medium
- 10:15 pm
- 22:10
- 10:10 am
- 00:05
44.Kirsty changes $380.80 into pounds (£) when £1 = $1.19. How many pounds does she receive?
Medium
- A£320.00
- B£453.15
- C£380.80
- D£320.80
45.Convert 8.5 km into metres.
Easy
46.Complete the conversion: 1 m = ___ cm.
Easy
1 m = ____ cm.
47.Convert 3.7 m² into cm².
Medium
48.Explain how to convert from US Dollars to Euros if the exchange rate is $1 = €0.92.
Easy
49.A plane leaves London at 09:30 and flies to New York. The flight takes 8 hours. New York is 5 hours behind London. What is the local time in New York when the plane arrives?
Medium
50.A film starts at 14:40 and ends at 16:25. How long does the film last? (Give your answer in minutes)
Easy
51.Convert 8.5 km into metres.
Easy
- A10200 m
- B7650 m
- C9350 m
- D8500 m
52.Convert 3.7 m² into cm².
Medium
- A37000 cm²
- B40700 cm²
- C44400 cm²
- D33300 cm²
53.A plane leaves London at 09:30 and flies to New York. The flight takes 8 hours. New York is 5 hours behind London. What is the local time in New York when the plane arrives?
Medium
- A1353 hhmm
- B1230 hhmm
- C1476 hhmm
- D1107 hhmm
54.A film starts at 14:40 and ends at 16:25. How long does the film last? (Give your answer in minutes)
Easy
- A116 minutes
- B94 minutes
- C105 minutes
- D127 minutes

Ghi chú ôn tập

## Time, Currency & Conversions – Quick Revision ### Time - **Conversions**: 1 min = 60 s, 1 h = 60 min, 1 day = 24 h, 1 week = 7 days, 1 year = 365 days. - **12-hour vs 24-hour**: 12:00 am = 00:00, 12:00 pm = 12:00. Add 12 for pm (except 12 pm stays 12:00). - **Calculating durations**: Work in chunks – minutes to next hour, then whole hours, then remaining minutes. - **Time zones**: If behind, subtract hours; if ahead, add hours. ### Exchange Rates - **Convert**: Multiply when going to the currency on the right of the rate; divide when going to the left. - E.g., £1 = €1.17: £ → € multiply by 1.17; € → £ divide by 1.17. - **Check**: If result should be bigger or smaller than original. ### Converting Units - **Length**: 1 cm = 10 mm, 1 m = 100 cm, 1 km = 1000 m. - **Mass**: 1 g = 1000 mg, 1 kg = 1000 g, 1 tonne = 1000 kg. - **Capacity**: 1 litre = 1000 ml, 1 ml = 1 cm³. - **Area**: Square the conversion factor. 1 cm² = 100 mm², 1 m² = 10 000 cm², 1 km² = 1 000 000 m². - **Volume**: Cube the conversion factor. 1 cm³ = 1000 mm³, 1 m³ = 1 000 000 cm³. ### Tips - For time, use calculator's ° ' '' button if needed. - When stuck on multiply/divide, test both and pick the sensible one.

24-hour clock: Time format using four digits (00:00 to 23:59). Midnight is 00:00, midday is 12:00.
12-hour clock: Time format using am (midnight to midday) and pm (midday to midnight).
Exchange rate: The value of one currency in terms of another, e.g., £1 = €1.17.
Conversion factor: The number used to multiply or divide when converting units (e.g., 100 cm per metre).
Squared units: Area units obtained by squaring the linear conversion factor (e.g., 1 m² = 10 000 cm²).
Cubic units: Volume units obtained by cubing the linear conversion factor (e.g., 1 m³ = 1 000 000 cm³).

Thẻ ghi nhớ

How many hours are in 3 days?

72 hours.

Convert 5.3 kilometres to metres.

5300 m.

Convert 4.6 metres to centimetres.

460 cm.

Convert 560 metres to kilometres.

0.56 km.

Convert 3670 centimetres to metres.

36.7 m.

Convert 4365 metres to centimetres.

436500 cm.

Convert 645 mm to cm.

64.5 cm.

Write 3.25 pm in the 24-hour clock.

15:25.

A bus leaves at 0735. Sami takes 23 minutes to walk to the bus station. What is the latest time he can leave his house?

07:12 (or 7:12 am).

A bus journey takes 41 minutes, departing at 0735. What is the arrival time?

08:16.

Thor changes 40 000 Icelandic Krona into dollars at 1 krona = $0.0099. How many dollars does he receive?

$396.

Jeremy buys a bracelet for 2050 yen at 1 yen = $0.0125. Calculate the price in dollars, correct to the nearest dollar.

$26.

A lesson starts at 1105 and lasts 75 minutes. What time does it end?

12:20.

Ivy changes $650 into euros at $1 = 0.8626 euros. How many euros does she receive?

560.69 euros.

Convert 4.37 litres to cubic centimetres.

4370 cm³.

Sean buys a pot costing 1200 yuan at $1 = 6.4 yuan. Cost in dollars?

$187.50.

Café opening times: Mon-Fri 8am-6pm, Sat 9:30am-3pm, Sun closed. Total hours open per week?

55.5 hours.

A train from Woodton to Northley takes 6h 25m, leaves at 19:46. Arrival time?

02:11 (next day).

What is 7 hours 36 minutes before 13:26?

05:50.

Levante changes 24 650 Hungarian forints to dollars at $1 = 290 forints. How many dollars?

$85.

Rashid changes 30 000 rupees to dollars at $1 = 68.14 rupees. How many dollars?

$440.27 (approx).

Musa has a 250ml glass, drinks 5 glasses from a 2-litre bottle. Water left in ml?

750 ml.

Peter works Mon 08:30-16:00, Tue 10:00-17:00, Thu 08:30-16:30, Sat 08:00-18:30. Total hours per week?

Mon: 7.5 h, Tue: 7 h, Thu: 8 h, Sat: 10.5 h. Total = 7.5+7+8+10.5 = 33 hours.

A machine paints 80 m in 5 minutes. How many metres in 45 minutes?

720 m.

How many minutes to paint a 2.8 km line at 80 m per 5 minutes?

175 minutes.

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