0.4×1⼀4+2⼀9的和乘以0.9的简便计算

2025-04-13 09:35:56
推荐回答(2个)
回答1:


请采纳

回答2:

(4x1/4+20/9)x0.9
=(1+20/9)x0.9x10
=9+20
=29
乘了2次10
=29/100
=0.29