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12.45%1.96%0.8

原式=12.45-2-1+0.04+0.2=9.45+0.24=9.69 如有帮助请采纳,手机则点击右上角的满意,谢谢!!

12.45-1.96-0.8 =10.49-0.8 =9.69

=12.45-2+0.04-0.8 =10.45-0.76 =9.69

12.45-1.96-0.8 =12.45-2+0.04-1+0.2 =9.45+0.24 =9.69

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