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Time problem of mathematics in grade three
The alarm clock at home shows that it took Xiao Liang four hours to go out and come back, but he only stayed in the library for one and a half hours, so the total time for him to go back and forth was two and a half hours, which calculated that it took him one hour and fifteen minutes to get home from the library. Xiao Liang arrived at the library at 8: 50 and went home after reading for an hour and a half. Then the time when he left the library should be 10: 20. It takes one hour and fifteen minutes to get home, so the correct time for him to get home is 1 1: 35. So he wants to set the time to 1 1: 35 to make the alarm clock on time.