12➕12➕12➕6乘法算式怎么列？

Question

如题所述

Answer 1

12+12+12+6
=6x2+6x2+6x1
=6x(2+2+1)
=6x5
=30

Answer 2

12
x12
12
一一

Answer 3

12+12+12+6
=12X3+6
=36+6
=42

12+12+12+6
=2X6+2X6+2X6+6
=（2+2+2+1）X6
=7X6
=42

Answer 4

乘法算式乘法加法算成乘法，可以把12都变成六，那就是三个12相加，实际上就是六个六相加，一共是七个六，就是6×7=42