⚡ 乘法运算律

交换律：a × b = b × a
结合律：(a × b) × c = a × (b × c)
分配律：a × (b + c) = a × b + a × c

⚙️ 实验控制

a = 3
b = 4
c = 2
定律

📐 定律验证

交换律 a × b
3 × 4 = 12
=
交换律 b × a
4 × 3 = 12