First grade mathematics I was teaching them to know time recently. The main content is full time. For example, 7:00 is read as 7 o'clock, and 10:00 is read as 10 o'clock. And it's almost 10 o'clock or 10 o'clock is a little bit more than I say it is about 10 o'clock. We also studied for a while, for example: 12:30 is read as 12:30. 6:30 is read as 6:30.
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