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简便方法计算18.36-2.25+1.64-4.75=
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5.36-2.78-2.36
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人气:456 ℃ 时间:2020-03-27 12:43:24
解答
18.36-2.25+1.64-4.75
=18.36+1.64-(2.25+4.75)
=20-7
=13
5.36-2.78-2.36
=5.36-2.36-2.78
=3-2.78
=0.22
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