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Mathematical problems about angles (grade seven)
1。 360*20=7200

2。 6 0 30 60 90 120

3. Solution: The minute hand turns 360 degrees and the hour hand turns 30 degrees.

That is, the minute hand rotates 12 degrees, and the hour hand rotates 1 degree.

At four o'clock, the difference between the hour hand and the minute hand is 120 degrees.

So the minute hand rotates 130 and 1 1. 10 degrees (the process cannot be written here ...)