4.6×0.5-1.94 15.89×0.35+0.65×15.89
20.9-8.25-1.75 4×20×0.25
60.8-6.25-3.75 53.8-3.8×0.7
0.125×16.9×0.8 7.54×0.29-0.29×6.54