计算下面各题，能简便的就简便．
5.5×17.3+6.7×5.5             1.5×105                           9.07﹣22.78÷3.4
4×3.09×0.25                  0.26×2.5+0.74×2.5+2.5           18.09﹣7.5×（0.14+1.06）