4⼀9×[3⼀4-(7⼀16-0.25)]简便运算。

2025-02-27 13:25:29
推荐回答(2个)
回答1:

4/9×[3/4-(7/16-0.25)]
=4/9×[3/4+1/4-7/16]
=4/9×[1-7/16]
=4/9×9/16
=1/4

回答2: