如题所述
17.5+ 0.607x18
= 17.5+ 0.607x10 + 0.607x8
= 17.5+ 6.07 + 4.856
= 23.57 + 4.856
= 23.5+0.07 + 4.5+0.356
= 23.5+4.5 + 0.07+0.356
= 28 + 0.426
= 28.426
= 17.5+ 0.607x10 + 0.607x8
= 17.5+ 6.07 + 4.856
= 23.57 + 4.856
= 23.5+0.07 + 4.5+0.356
= 23.5+4.5 + 0.07+0.356
= 28 + 0.426
= 28.426
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第1个回答 2017-09-21
??这是问题么?