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201.2*20.01-201.1*19.99简算
人气:293 ℃ 时间:2019-12-07 12:31:12
解答
201.2×20.01一201.1×19.99
=201.2×(20+0.01)一201.1×(20一0.01)
=4024+2.012一4022+2.011
=2+4.023
=6.023
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