(0.25+四分之一×99)÷六分之五
问题描述：
(0.25+四分之一×99)÷六分之五
答
(0.25+1/4 X99) / 5/6
=(1/4+1/4X99) / 5/6
=1/4X(99+1) / 5/6
= 1/4X100/ 5/6
=25X5/6
=125/6