1.48+9.87+8.5213.89-4.32-4.68 15.27+4.64-527
1.25×4.6×8 2.5×9.68×0.41.25×32×0.25
12×4.5+88×4.5 10.1×9.4 38×0.45+62×0.45
99×0.863.6×18-3.6×8