1.用简便算法计算 2⼀5×4×3⼀4 = = = 5⼀7×16×21⼀5 = = =

2025-02-27 02:37:10
推荐回答(1个)
回答1:

2/5×4×3/4
=2/5×3
=6/5
5/7×16×21/5
=5/7×21/5×16
=3×16
=48