简便计算24*(1/4 +6/5 -7/12)

问题描述:

简便计算24*(1/4 +6/5 -7/12)

错了吧,应该是24*(1/4 +5/6-7/12)
24*(1/4 +5/6-7/12)
=24*(6/24+20/24-14/24)
=24*(6+20-14)/24
=6+20-14
=12

24*(1/4 +5/6 -7/12)=24/4+24*5/6-24*7/12=6+20-14=12

错了吧,应该是24*(1/4 +5/6-7/12)
24*(1/4 +5/6-7/12)
=24*1/4 +24*5/6 -24*7/12
=6+30-14
=22