=1/4÷1/4×(1/5×1/5)=1×1/25=1/25请点采纳谢谢
1/4×1/5÷1/4×1/5=(1/4÷1/4)×(1/5×1/5)=1×1/25=1/25
11/5
1/4×1/5÷1/4×1/5=(1/4÷1/4)×(1/5×1/5)=1×1/25=1/25。