3⼀5乘7⼀15加8⼀15乘5⼀3用简便算法计算

2025-12-25 04:46:09
推荐回答(1个)
回答1:

3/5×7/15+8/15×5/3
=1/15×(21/5+40/3)
=1/15×(63+200)/15
=263/225