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What are the ways to write the time of the clock in the first grade mathematics?
Time: 12 (12)

Half an hour: 12: 30 (12: 30)

1 is the quarter, and 3 o'clock is the quarter: 12 o'clock 1 quarter (12: 15), 12 o'clock in the third quarter (12:45).

Less than an hour: 65438+5 minutes to 02 (1 1:55)

Other time:12: 21:(12: 21)

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