Time Currency And Conversions

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Time Conversions

Time uses non-decimal units: 60 seconds = 1 minute, 60 minutes = 1 hour, 24 hours = 1 day.
Know days in each month: e.g., 28/29 Feb, 30 Apr/Jun/Sep/Nov, 31 Jan/Mar/May/Jul/Aug/Oct/Dec.
To convert hours to minutes, multiply by 60; minutes to hours, divide by 60.
When calculating time intervals, work in chunks: minutes to next hour, then whole hours, then remaining minutes.
For journeys crossing midnight, add hours from start to midnight plus hours from midnight to end.

12-Hour and 24-Hour Clocks

12-hour clock uses AM (midnight to midday) and PM (midday to midnight).
24-hour clock uses four digits: first two for hours (00-23), last two for minutes (00-59).
Convert 12-hour to 24-hour: for PM (except 12pm) add 12; for AM 12am = 00:00.
Convert 24-hour to 12-hour: subtract 12 from hours 13-23 and add PM; 00:00 = 12am, 12:00 = 12pm.
Analogue clock: short hand = hours, long hand = minutes (each number = 5 minutes).

Reading time from an analogue clock

Calculating with Time

Add time in chunks: add hours first, then minutes, adjusting if minutes exceed 60.
Subtract time by counting minutes to next hour, then hours, then remaining minutes.
For journeys starting and ending on same day, simply subtract start from end times.
For overnight journeys, calculate time from start to midnight plus time from midnight to end.
Use a calculator's ° ' '' button to enter time; 1 hour 30 min = 1.5 decimal hours.

Bus and Train Timetables

Timetables usually use 24-hour clock without colon (e.g., 0750 for 07:50).
Each column represents one service; times are departure times except last row (arrival).
Journey time = difference between departure at start and departure/arrival at end for same service.
Read across the row for a given service to find times at different stops.

Bus timetable

Time Zones

Time zones differ by hours; some locations are ahead, others behind a reference (e.g., GMT).
To convert to a time zone behind, subtract the time difference; to one ahead, add.
When calculating flight times, work in departure local time then adjust to arrival local time.
Example: Madrid is 7 hours ahead of Chicago; a 9h45m flight from Madrid at 7:30am arrives Chicago at 10:15am local.

Money Calculations

Common currencies: US Dollar ($), Pound (£), Euro (€).
Keywords: 'total' means add, 'difference' means subtract, 'change' may involve exchange rates.
Round final answers to 2 decimal places for dollars, pounds, euros (e.g., $1.40 not $1.4).
For large amounts, round to nearest pound, ten pounds, or hundred as appropriate.
Use all decimal places given in working; round only final answer.

Exchange Rates

Exchange rate shows value of one currency in another (e.g., £1 = €1.17).
To convert from base currency to other, multiply by the exchange rate.
To convert from other currency to base, divide by the exchange rate.
If unsure whether to multiply or divide, check if result should be larger or smaller than original.
When converting via a third currency, convert to intermediate then to target.

Comparing Costs Across Currencies

Convert all prices to same currency using given exchange rates.
Compare converted values to determine which is cheaper or better value.
For best value, calculate cost per unit (e.g., per litre, per kg) in a common currency.
Round final comparison appropriately (e.g., nearest cent, nearest rupee).

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1.Aimee changes 250 euros into dollars. The exchange rate is 1 euro = $1.10. How many dollars does she receive?
Easy
- A$275
- B$227.27
- C$260
- D$250
2.A train journey takes 5 hours 54 minutes. The journey starts at 09 15. What time does the journey end?
Easy
- A15 09
- B14 09
- C15 19
- D14 19
3.A train leaves Zurich at 22 40 and arrives in Vienna at 07 32 the next day. How long does the journey take?
Medium
- A8 h 52 min
- B9 h 08 min
- C8 h 48 min
- D9 h 52 min
4.Jodi swims 22 lengths of a swimming pool to raise money for charity. She receives $15 for each length she swims. How much money does Jodi raise?
Easy
- A$330
- B$37
- C$3300
- D$220
5.Carlos starts work at 21 20 and finishes at 06 15 the next day. How long is Carlos at work?
Medium
- A8 h 55 min
- B9 h 05 min
- C8 h 45 min
- D9 h 55 min
6.Linda wants to change up to £200 into koruna. The exchange rate is £1 = 25.82 koruna. She can only get 100 koruna notes and wants as many as possible. How many 100 koruna notes should she get?
Medium
- A51
- B52
- C50
- D53
7.One morning, Marcia works from 08 20 to 11 15. How long does she work for? Give your answer in hours and minutes.
Easy
- A2 h 55 min
- B3 h 05 min
- C2 h 45 min
- D3 h 15 min
8.Convert 0.17 m² into cm².
Easy
- A1700 cm²
- B17 cm²
- C170 cm²
- D0.0017 cm²

Mehr Fragen

9.A train timetable (all times local) is shown below. Marseille is 1 hour ahead of London. | Station | Time | |---|---| | London | 07 19 | | Ashford | 07 55 | | Lyon | 13 00 | | Avignon | 14 08 | | Marseille | 14 46 | Work out the total journey time from London to Marseille.
Medium
- A7 h 27 min
- B6 h 27 min
- C8 h 27 min
- D7 h 47 min
10.A campsite price list is shown below. Today there are 54 tents and 18 caravans. | Type | Fee per night | |---|---| | Tent | $12 | | Caravan | $25 | Calculate the total fees charged today.
Easy
- A$1098
- B$648
- C$450
- D$1134
11.Thor changes 40 000 Icelandic Krona into dollars when the exchange rate is 1 krona = $0.0099. How many dollars does he receive?
Easy
- A$396
- B$3960
- C$40
- D$400
12.Rashid changes 30 000 rupees to dollars when the exchange rate is $1 = 68.14 rupees. How many dollars does he receive?
Medium
- A$440.27
- B$440.28
- C$440
- D$441
13.When local time in Athens is 09 00, local time in Berlin is 08 00. A plane leaves Athens at 13 15 and arrives in Berlin at 15 05 local time. Find the flight time.
Medium
- A1 h 50 min
- B2 h 50 min
- C1 h 10 min
- D2 h 10 min
14.Karel changed $300 into 3891 Namibian dollars. Complete the statement: $1 = ? Namibian dollars.
Medium
- A12.97
- B12.96
- C12.95
- D13.00
15.A new model locomotive costs $64. Calculate the cost in rupees when 1 rupee = $0.0154. Give your answer correct to the nearest 10 rupees.
Medium
- A4160 rupees
- B4150 rupees
- C416 rupees
- D415 rupees
16.In the UK, petrol cost £1.24 per litre. In the USA, petrol cost $3.15 per US gallon. 1 US gallon = 3.79 litres, £1 = $1.47. Is petrol cheaper in the UK or USA?
Hard
- AUK
- BUSA
- CSame price
- DCannot determine
17.A bus journey starts at 09 45 and ends at 11 20. How long does the journey take?
Easy
- A1 hour 35 minutes
- B1 hour 25 minutes
- C2 hours 25 minutes
- D1 hour 45 minutes
18.Convert 3.5 hours into minutes.
Easy
- A210 minutes
- B350 minutes
- C200 minutes
- D300 minutes
19.A shop sells apples for $1.20 per kilogram. How much do 5 kg of apples cost?
Easy
- A$6.00
- B$5.00
- C$7.00
- D$6.20
20.Change 300 euros into dollars if the exchange rate is 1 euro = $1.15.
Easy
- A$345
- B$315
- C$285
- D$300
21.A train leaves at 14 52 and arrives at 16 38. How long is the journey?
Easy
- A1 hour 46 minutes
- B1 hour 56 minutes
- C2 hours 46 minutes
- D1 hour 36 minutes
22.Mia buys 3 pens at $1.25 each and 2 notebooks at $2.50 each. She pays with a $20 bill. How much change does she receive?
Medium
- A$11.25
- B$8.75
- C$10.00
- D$12.50
23.Convert 2000 rupees to dollars if $1 = 75 rupees.
Easy
- A$26.67
- B$30.00
- C$25.00
- D$27.00
24.A film starts at 19 45 and lasts 2 hours 10 minutes. At what time does it end?
Easy
- A21 55
- B22 05
- C21 45
- D22 15
25.Tom changes $250 into euros when €1 = $1.20. How many euros does he receive?
Medium
- A€208.33
- B€300
- C€200
- D€250
26.A plane leaves London at 08 45 and arrives in New York at 11 30 local time. New York is 5 hours behind London. How long is the flight?
Medium
- A7 hours 45 minutes
- B8 hours 15 minutes
- C6 hours 45 minutes
- D7 hours 15 minutes
27.A shop sells 3 kg of potatoes for $4.50. How much do 7 kg cost?
Easy
- A$10.50
- B$9.50
- C$11.00
- D$10.00
28.A tourist changes $500 into yen at a rate of $1 = 110 yen. How many yen does she receive?
Easy
- A55,000 yen
- B5,500 yen
- C550,000 yen
- D55,500 yen
29.A train leaves at 23 15 and arrives at 06 45 the next day. How long is the journey?
Medium
- A7 hours 30 minutes
- B8 hours 30 minutes
- C7 hours 15 minutes
- D8 hours 15 minutes
30.A camera costs £250 in London and €300 in Paris. Exchange rate: £1 = €1.16. Where is the camera cheaper and by how much?
Medium
- ALondon, by €10
- BParis, by €10
- CLondon, by €20
- DParis, by €20
31.A mechanic works from 08 30 to 12 45 and then from 13 30 to 17 15. How many hours does he work in total?
Medium
- A8 hours
- B7 hours 30 minutes
- C8 hours 30 minutes
- D7 hours
32.How many minutes are there in 2.25 hours?
Easy
- A135 minutes
- B125 minutes
- C150 minutes
- D145 minutes
33.A shop sells apples for $2.69 per kilogram and bananas for $1.45 per kilogram. Barbara buys 5 kg of apples and 3 kg of bananas. She pays with a $50 note. How much change does she receive?
Medium
- A$32.20
- B$17.80
- C$18.20
- D$31.80
34.A train timetable (all times local) is shown below. Lyon is 1 hour ahead of London. | Station | Time | |---|---| | London (depart) | 07 19 | | Ashford (arrive) | 07 55 | | Ashford (depart) | 08 30 | | Lyon (arrive) | 13 00 | What is the total journey time from London to Lyon, in hours and minutes?
Hard
- A5 h 41 min
- B6 h 41 min
- C4 h 41 min
35.In the UK, petrol costs £1.24 per litre. In the USA, petrol costs $3.15 per US gallon. 1 US gallon = 3.79 litres, and £1 = $1.47. Which country has cheaper petrol and by how much per litre in dollars?
Hard
- AUSA cheaper by $0.99
- BUK cheaper by $0.99
- CUSA cheaper by $1.24
- DUK cheaper by $0.12
36.A chef buys cheese from France. 200 g of cheese costs 3.45 euros. Exchange rate: $1 = 0.84 euros. What is the maximum mass of cheese, in kg, the chef can buy with $150?
Hard
- A7.3 kg
- B8.2 kg
- C6.5 kg
- D7.8 kg
37.A dressmaker charges $35 or 2300 rupees to make a dress. Exchange rate: 1 rupee = $0.0153. Which payment method is cheaper and by how much in rupees?
Hard
- ADollars cheaper by 14 rupees
- BRupees cheaper by 14 rupees
- CDollars cheaper by 12 rupees
- DRupees cheaper by 12 rupees
38.A museum is open Monday to Friday 09 00 to 17 00, Saturday and Sunday 10 00 to 16 00. During opening hours, 4 security guards work at any time. Each guard works a maximum of 30 hours per week. What is the smallest number of guards needed each week?
Challenge
- A8
- B9
- C10
- D7
39.How many minutes are there in 2 hours 15 minutes?
Easy
- A135 minutes
- B215 minutes
- C125 minutes
- D150 minutes
40.Convert 5.5 hours into hours and minutes.
Easy
- A5 hours 30 minutes
- B5 hours 50 minutes
- C5 hours 5 minutes
- D5 hours 15 minutes
41.Which of the following shows 8:15 pm in 24-hour clock time?
Easy
- A08:15
- B20:15
- C18:15
- D08:15 pm
42.What is 14:35 in 12-hour clock time?
Easy
- A2:35 pm
- B2:35 am
- C4:35 pm
- D12:35 pm
43.00:00 is midday.
Easy
True or false?
44.Match each 24-hour time to its 12-hour equivalent.
Easy
- 00:30
- 12:15
- 23:45
- 07:00
- 12:30 am
- 12:15 pm
- 11:45 pm
- 7:00 am
45.Arrange these times in order, from earliest to latest: 2:45 pm, 11:20 am, 14:10, 09:55, 23:05.
Easy
- 2:45 pm
- 09:55
- 23:05
- 14:10
- 11:20 am
46.Match each 12-hour clock time to its 24-hour clock equivalent.
Easy
- 3:15 pm
- 11:45 pm
- 12:00 am
- 7:30 am
- 07:30
- 15:15
- 00:00
- 23:45
47.Arrange these times in order from earliest to latest.
Easy
- 10:25 am
- 22:15
- 2:40 pm
- 00:10
- 11:55 pm
48.A flight departs at 14:45 and arrives at 22:10 the same day. Which of the following statements are correct? (Select all that apply)
Medium
- AThe flight duration is 7 hours 25 minutes.
- BThe flight duration is 445 minutes.
- CThe flight duration is 7 hours 35 minutes.
- DThe departure time in 12-hour clock is 2:45 pm.
- EThe arrival time in 12-hour clock is 10:10 pm.
49.Convert 3 hours 45 minutes into minutes.
Easy
50.A bus journey starts at 09 45 and ends at 11 20. How many minutes does the journey take?
Easy
51.A train leaves at 14 52 and arrives at 16 38. How long is the journey in minutes?
Easy
52.Convert the following times from 12-hour to 24-hour clock.
Medium
3:15 pm = ____, 11:45 am = ____, 12:00 am = ____
53.Kirsty changes $380.80 into pounds (£) when £1 = $1.19. Calculate the amount Kirsty receives.
Medium
54.A train leaves at 09 52 and arrives at 13 17. How many minutes is the journey?
Medium
55.Complete the conversion: 2 days 5 hours 30 minutes = ___ minutes.
Medium
2 days 5 hours 30 minutes = ____ minutes.
56.Convert 3 hours 45 minutes into minutes.
Easy
- A202 minutes
- B248 minutes
- C271 minutes
- D225 minutes
57.A bus journey starts at 09 45 and ends at 11 20. How many minutes does the journey take?
Easy
- A105 minutes
- B95 minutes
- C85 minutes
- D115 minutes
58.A train leaves at 14 52 and arrives at 16 38. How long is the journey in minutes?
Easy
- A117 minutes
- B128 minutes
- C106 minutes
- D95 minutes
59.Kirsty changes $380.80 into pounds (£) when £1 = $1.19. Calculate the amount Kirsty receives.
Medium
- A320 £
- B352 £
- C288 £
- D384 £
60.A train leaves at 09 52 and arrives at 13 17. How many minutes is the journey?
Medium
- A184 minutes
- B205 minutes
- C247 minutes
- D226 minutes

Lernnotizen

## Time, Currency & Conversions ### Time - **Conversions**: 60 seconds = 1 minute, 60 minutes = 1 hour, 24 hours = 1 day, 365 days = 1 year (366 in leap year). - **12-hour clock**: AM (midnight to midday), PM (midday to midnight). - **24-hour clock**: 00:00 (midnight) to 23:59. No AM/PM. - **Calculating time intervals**: Work in chunks – minutes to next hour, then whole hours, then remaining minutes. - **Time zones**: If ahead, subtract; if behind, add. Convert local times carefully. ### Money Calculations - **Keywords**: total (add), difference (subtract), exchange (multiply/divide). - **Rounding**: Usually 2 decimal places for dollars, pounds, euros. Write both decimals (e.g., $1.40). - **Large numbers**: Round to nearest whole number or as per question. ### Exchange Rates - **Convert from currency A to B**: Multiply by exchange rate (A → B). - **Convert from currency B to A**: Divide by exchange rate (B → A). - **Check**: If result is larger than original, you multiplied; if smaller, divided. Use logic. ### Key Tips - Use calculator's ° ' '' button for time. - 1 hour 30 min = 1.5 hours on calculator. - Always write currency symbol and correct decimal places.

Exchange rate: The value of one currency in terms of another, used to convert between currencies.
24-hour clock: Time display using four digits (00:00 to 23:59) without AM/PM.
12-hour clock: Time display using AM (midnight to midday) and PM (midday to midnight).
Time zone: A region where the same standard time is used; differences are in hours ahead or behind GMT/UTC.
Currency: A system of money used in a country, e.g., USD, GBP, EUR.

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