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简算:0.98*42 简算:8.4*0.26+0.27
人气:201 ℃ 时间:2020-04-15 01:43:13
解答
你好

0.98*42
=(1-0.02)*42
=1*42-0.02*42
=42-0.84
=41.16

8.4*0.26+0.27
=2.184+0.27
=2.454

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