29/13-(3/13+5/7) 25-25×99/100

问题描述:

29/13-(3/13+5/7) 25-25×99/100
简便运算
快,

29/13-(3/13+5/7)
=29/13-3/13-5/7
=2-5/7
=9/7
25-25×99/100
=25×(1-99/100)
=25×1/100
=1/4