计算下面各题，怎样算简便就怎样算．0.25×39+0.25 2.85÷1.25÷0.8 ...

Question

计算下面各题，怎样算简便就怎样算．0.25×39+0.25 2.85÷1.25÷0.8 4.05÷0.5-1.14．

Answer 1

（1）0.25×39+0.25
=0.25×（39+1）
=0.25×40
=10

（2）2.85÷1.25÷0.8
=2.85÷（1.25×0.8）
=2.85÷1
=2.85

（3）4.05÷0.5-1.14
=8.1-1.14
=6.96