12/7÷(2/3-1/4) 要简算
问题描述:
12/7÷(2/3-1/4) 要简算
答
12/7÷(2/3-1/4)
=12/7×12÷(2/3×12-1/4×12)
=12/7×12÷(8-3)
=12/7×12/5
=144/35