Calculations Involving Time
Muhtasari
Time is the one quantity that refuses to work in tens. Sixty seconds in a minute, sixty minutes in an hour, twenty-four hours in a day: this base of sixty trips up anyone who treats a clock like a decimal number. Getting time arithmetic right is essential for timetables, schedules and any problem set in the real world.
In this lesson you will calculate with units of time, convert between the 12-hour and 24-hour clock, and read timetables to work out durations and arrival times. The key idea throughout is that time is counted in sixties, not tens, so a decimal answer must be read with care.
Malengo
- Calculate with units of time and read clocks and timetables, including the 12-hour and 24-hour clock.
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Hongera kwa kukamilisha somo la Calculations Involving Time. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
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- Write 7:45 pm in 24-hour form. A. 07:45 B. 17:45 C. 19:45 D. 19:75 Answer: C
- A train leaves at 14:35 and arrives at 16:10. How long is the journey? A. 1 h 25 min B. 1 h 35 min C. 2 h 35 min D. 1 h 45 min Answer: B
- How many minutes are there in 2.5 hours? A. 125 B. 150 C. 25 D. 250 Answer: B
- Write 1 hour 45 minutes as a decimal number of hours. A. 1.45 B. 1.75 C. 1.45 h exactly D. 1.4 Answer: B
- Write 06:20 in 12-hour form. A. 6:20 am B. 6:20 pm C. 18:20 D. 6:20 Answer: A
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