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Why isn't there a problem that the decimal point of mathematics in the third grade of primary school is a few points = () angle = () yuan?
Examples are as follows:

15 point =( 1.5) angle =(0. 15) yuan.

5 points =(0.5) Angle =(0.05) yuan.

105 point =( 10.5) angle = (10.05) yuan.

1 yuan = 10 angle = 100 point, 1 angle = 10 point.

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