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19.2*13.5-0.234*1920+209*1.92
人气:285 ℃ 时间:2020-04-19 20:08:24
解答
1059017693 ,
19.2*13.5-0.234*1920+209*1.92
=19.2×13.5-23.4×19.2+20.9×19.2
=19.2×(13.5+20.9-23.4)
=19.2×11
=19.2×10+19.2
=192+19.2
=211.2
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