教我一下运算律
- 加法结合律：a + (b + c) = (a + b) + c
- 加法交换律：a + b = b + a
- 加法零元律：a + 0 = a
- 减法结合律：a - (b - c) = (a - b) - c
- 减法交换律：a - b ≠ b - a
- 乘法结合律：a × (b × c) = (a × b) × c
- 乘法交换律：a × b = b × a
- 乘法零元律：a × 0 = 0
- 乘法分配律：a × (b + c) = (a × b) + (a × c)
- 除法分配律：a ÷ (b + c) ≠ (a ÷ b) + (a ÷ c)
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