Explanation: This is a division of an abacus formulas, is half the mean equal to 0.5. Metaphor both sides equally. Source: Qing Shi Yukun "San Xia Wu Yi," the second time choose to take the 'add 21 to 5' of belongings, and now we have to face '31 31' a. " Examples: S the deal, regardless of Profits, ~.
No. 2
This is a division of an abacus formulas, is 1 / 2 = 0.5, meaning by that the two sides split.
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No. 3
The formulas for the Abacus division of one is 1 / 2 = 0.5 mean. By means or average the two sides split responsibilities and tasks. Ouyang Shan, "senior cadres of the large" Chapter XII: "Each of you have got 150 yuan. This is called 21 for 5 Tim, who does not account for who's cheaper." Zhang Tianyi, "Qingming Festival" 6: " As for wages to do the door - I told you 21 Tim for five. "