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Time problem of mathematics in grade three
I can't do the math test paper in the third grade of primary school.

1

Grandma went to the activity center at 6: 30 this morning, which was earlier than yesterday 10 minutes. She went to exercise at 6: 40 yesterday.

Master Wang of the toy factory can make 8 toys at 1 hour and 24 toys at 1 1 hour at 8: 00. (1 1-8)x8=24 (pieces)

How many players went to Li Nainai's house to clean up? It starts at 3:30 pm and ends at 4: 10. It took 40 minutes.

Master Zhang, a worker, made 54 parts in 6 minutes, 2 more parts per minute than Master Zhang, and made 1 1 parts per minute. 54÷6+2= 1 1

Xiaoming walks from home to school 15 minutes. He arrives at school at 7:40 every day. He should leave home at 7: 25.