如题所述
第1个回答 2012-04-22
5-(6/7÷3/14+3/16÷3/8)
=5-(4+1/2)
=5-4又2分之1
=1/2
3/4÷【(3/5-1/4)×3/7】
=3/4÷3/7÷(3/5-1/4)
=7/4÷(3/5-1/4)
=7/4÷7/20
=5
这两个都没什么简算的
=5-(4+1/2)
=5-4又2分之1
=1/2
3/4÷【(3/5-1/4)×3/7】
=3/4÷3/7÷(3/5-1/4)
=7/4÷(3/5-1/4)
=7/4÷7/20
=5
这两个都没什么简算的
第2个回答 2012-04-22
5-(6/7÷3/14+3/16÷3/8)
=5-(4+1/2)
=5-4-1/2
=1/2
3/4÷【(3/5-1/4)×3/7】
=3/4÷(7/20x3/7)
=3/4÷3/20
=3/4x20/3
=5
=5-(4+1/2)
=5-4-1/2
=1/2
3/4÷【(3/5-1/4)×3/7】
=3/4÷(7/20x3/7)
=3/4÷3/20
=3/4x20/3
=5