5⼀4×0.45,怎么简便计算

2025-05-13 17:37:57
推荐回答(2个)
回答1:

解:原式=5/4x0.45
=1.25x0.45
=0.5625
答:答案是0.5625,

回答2:

5/4×0.45
=5/4×45/100
=5/4×9/20
=45/80
=9/16