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很高興為您解答! 首先,分解公因式,然後選取公因式; 1.8=100*0.018;0.18=10*0.018 100*0.62*0.018+10*0.018*3.9-0.018 0.018*(62+39-1)=0.018*100=1.8 希望我的回答對您有用!
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