一、计算下面各题，能算便的就简便。
0.8×32.5×12.5 7.6×9.9×0.01 8.32×0.58-0.32×0.58
1.25÷5+0.25×20 10.69-2.5×2.4 0.3×2.5×0.04
8.4×57+8.4×42+8.4 13÷0.65÷2 7.2×10.1-7.2
1.2×2.5+2.8×2.5 32×0.65＋3.2×3.5
