17⼀20-5⼀12-(1⼀12+7⼀20)怎样简便运算?

2025-02-23 14:57:35
推荐回答(1个)
回答1:

简便计算
17/20-5/12-(1/12+7/20)
=(17/20-7/20)-(5/12+1/12)
=1/2-1/2
=0