2⼀9×1⼀4 3⼀4×7⼀9怎么简便列式?

2025-03-06 22:38:21
推荐回答(1个)
回答1:

简便计算
2/9×1/4+ 3/4×7/9
=1/9x2/4+21/4x1/9
=1/9x(2/4+21/4)
=1/9x23/4
=23/36