12.5×0.4×2.5×8
0.87×3.16+4.64
9.5×101
6.81+6.81×99
0.25×185×40
4.4×0.8- 3.4× 0.8
9.37×4×2.5
2.37×6.3+2.37×3.7
2.5×1.25×0.32