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Common Notions
1.等于同量的量也彼此相等
Things which are equal to the same thing are also equal to one another.
2.等量加等量，其和相等
If equals be added to equals, the wholes are equal.
3.等量减等量，其差相等
If equals be subtracted from equals, the remainders are equal.
4.彼此重合的东西彼此相等
Things which coincide with one another are equal to one another.
5.整体大于部分
The whole is greater than the part.