6⼀7×3⼀14-1⼀5×3⼀7+2⼀3怎么简便运算?

2024-11-25 11:47:36
推荐回答(1个)
回答1:

=3/7×3/7-1/5×3/7+2/3
=3/7×(3/7-1/5)+2/3
=3/7×8/35+2/3
=24/245+2/3
=72/735+490/735
=562/735