(2-4/5*0.75)/(2+4/5) 递等式计算
问题描述:
(2-4/5*0.75)/(2+4/5) 递等式计算
答
(2-4/5×0.75)/(2+4/5)
=(2-4/5×3/4)÷(2+4/5)
=(2-3/5)÷(2+4/5)
=7/5÷14/5
=7/5×5/14
=1/2