{2分之1+8分之1}乘75% 10除以9分之5+4乘12.5% 4分之1除以{1-2分之1-25%} 【1-{8分之3+4分之1}】*25%
问题描述:
{2分之1+8分之1}乘75% 10除以9分之5+4乘12.5% 4分之1除以{1-2分之1-25%} 【1-{8分之3+4分之1}】*25%
能简便的要简便!
答
(1/2+1/8)x75%
=5/8x3/4
=15/32
10÷5/9+4x12.5%
=18+4x1/8
=37/2
1/4÷(1-1/2-25%)
=1/4÷(1/2-1/4)
=1/4÷1/4
=1
[1-(3/8+1/4)]x25%
=[1-1/8]x1/4
=7/32