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10-(0.2+6.37*0.7)简便计算

人气:158 ℃ 时间:2020-04-24 08:11:05
解答
原式=10-0.2-6.37×0.7 =9.8-0.7×6.37 =0.7×14-0.7×6.37 =0.7×(14-6.37) =0.7×7.63 =5.341
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