負數
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負數
者,小於
〇
之數也。大於〇者,謂之
正數
。負數與〇,謂之非正數也。
一數加負數,等於減其相反數,如
2
+
(
−
2
)
=
2
−
2
=
0
。
負數乘正數,得負數。負數乘負數,得正數。
Template:Stub
Category
:
數
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