Exercises on the distribution law of multiplication in the first grade of junior high school
Take a look here (especially the second one)
Using letters to express the law of combination of multiplication___ On the distribution law of representation multiplication___ .
(1) The law of combination of multiplication is written in letters: (a × b) × C = a × (B × C); (2) the law of distribution of multiplication is written in letters: (a + b) × C = a × C + B × C; so the answer is: (a × b) × C = a × (B × C); (a + b) × C = a × C + B × C
How to express the law of distribution by multiplication in letters
It can be expressed by letters: (a + b) x C = AXC + bxc. There is another expression: ax (B + C) = AXB + AXC