给你出了20道:
91.4-(7+11.4),92-55.2+25.2,75÷8÷12.5,224÷32÷25
137.5÷(5.5×2.5),162-50.5-49.5,8.66×4.7+8.66×5.3,9.5×78
5×0.61-5×0.39,195÷52÷2.5,28.925÷6.5÷0.5,9×8×1.25
8+16.9+2,142-55-45,7.95×9.1+7.95×0.9,150.3-(39.9+50.3)
71.5+(21+88.5),164+536.9-136.9,160÷32÷12.5,1.25×24
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