Conversion method:
1, single unit conversion: large to small, long tail, plus a 0; Small becomes big, the tail falls off, MINUS one zero.
Similarly, 10 points = () angle, and the change angle is a small unit that becomes larger. Remove the tail and subtract a zero. The answer is 1 angle.
2. Multi-unit conversion: add an adjacent unit larger than yourself in the middle of two digits of a unit, or remove the large unit in the middle of two units.
In the same way, 25 points = () Angle () points, separated by two, big unit ten digits, small unit single digits.
The above is the conversion method of RMB for first-grade primary school students.