4⼀5×1⼀4+1⼀5×3⼀4简便计算

2025-02-01 22:39:01
推荐回答(1个)
回答1:

4/5×1/4+1/5×3/4
=1/5×4/4+1/5×3/4
=1/5×(1+3/4)
=1/5×7/4
=7/20