用简便方法计算:7.8*53.9+5.39*22

用简便方法计算:0.01+0.02+0.03+0.04+···0.97+0.98+0.99
2025-06-28 07:02:22
推荐回答(1个)
回答1:

7.8*53.9+5.39*10*22/10=10*53.9=539