Switch the two addends and the sum remains the same.
两个数相加，交换加数的位置，他们的和不变。
2
In addition, switch the two addends and the sum remains the same.
两个数相加，交换加数的位置，他们的和不变。
3
This artide analyzes the various relationships between combined figures in Ancient Chinese: addends, factors, juxtaposed numbers, denominator, and numerator in a fraction, and so on.