计算下面各题，怎样简便就怎样计算．3.2×2.5×1.251.08×0.8÷0.271.9×9.9+0.1928.9÷1.25÷0.80.84×1.2+8.4×0.884.32×7.3+2.7×4.32．

Question

计算下面各题，怎样简便就怎样计算．
3.2×2.5×1.25
1.08×0.8÷0.27
1.9×9.9+0.19
28.9÷1.25÷0.8
0.84×1.2+8.4×0.88
4.32×7.3+2.7×4.32．

Answer 1

（1）3.2×2.5×1.25
=0.8×4×2.5×1.25
=（0.8×1.25）×（4×2.5）
=1×10
=10

（2）1.08×0.8÷0.27
=0.864÷0.27
=3.2

（3）1.9×9.9+0.19
=0.19×99+0.19×1
=0.19×（99+1）
=0.19×100
=19

（4）28.9÷1.25÷0.8
=28.9÷（1.25×0.8）
=28.9÷1
=28.9

（5）0.84×1.2+8.4×0.88
=8.4×0.12+8.4×0.88
=8.4×（0.12+0.88）
=8.4×1
=8.4

（6）4.32×7.3+2.7×4.32
=4.32×（7.3+2.7）
=4.32×10
=43.2