哪个乘法口诀 列三个算式

Question

如题所述

Answer 1

1*1.2*2.3*3.4*4.5*5.6*6.7*7.8*8.9*9.1*2.1*3.1*4.1*5..........

Answer 2

1*1.2*2 1*2.1*3.1*4

Answer 3

如；三四十二可得‘3×4＝12,12÷3＝4,12÷4＝3本回答被提问者和网友采纳

Answer 4

7成7