3⼀7×4⼀5+4⼀7×2⼀5简便计算

2024-12-03 20:54:37
推荐回答(1个)
回答1:

3/7×4/5+4/7×2/5
=6/7×2/5+4/7×2/5
=(6/7+4/7)×2/5
=10/7×2/5
=4/7.