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数学
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1.02*98和99.9*0.3用简便的方法计算(小学四年纪题)
人气:284 ℃ 时间:2020-04-13 13:37:44
解答
1.02*98 =1.02*(100-2) =1.02*100-1.02*2 =102-2.04 =99.96 99.9*0.3 =(100-0.1)*0.3 =100*0.3-0.1*0.3 =30-0.03 =29.97
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