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目录
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开始
1
乘法
2
运算
3
规则
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算术课程/数字运算/乘法
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来自维基教科书,开放的书籍,开放的世界
<
算术课程
|
数字运算
乘法
[
编辑
|
编辑源代码
]
加法是将两个量相加(合并)的运算,可以用以下方式表示
A x B
运算
[
编辑
|
编辑源代码
]
a x b = b x a
a x b x c = a x (b x c) = (a x b) x c
规则
[
编辑
|
编辑源代码
]
任何数乘以零等于零
a + 0 = a
任何数乘以自身等于
a x a = a
2
任何负数乘以自身等于
(-a) x (-a) = a
2
任何数乘以其负数等于
a x (-a) = -a
2
类别
:
书籍:算术课程
华夏公益教科书