6⼀7*(5⼀6-1⼀2)+1⼀2 简便运算咋算呀?急需

2025-06-21 15:29:24
推荐回答(2个)
回答1:

=6/7*5/6-6/7*1/2+1/2
=5/7+1/2*(1-6/7)
=5/7+1/2*6/7
=5/7+3/7
=8/7

回答2:

6/7*(5/6-1/2)+1/2
=6/7×5/6-6/7×1/2+1/2
=5/7-3/7+1/2
=2/7+1/2
=11/14