4.03×29=?请列竖式解答,

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4.03×29=?请列竖式解答,

4.03×29
=4.03×（30-1）
=4.03×30-4.03×1
=120.9-4.03
=116.87
0

解答，，解答 ...... 解答，，，解答解答。解答。。解答解答解答解答解答解答。。解答~~解答~~ 1=1吗有几种解答 1/(11*13*15)+1/(13*15*17)+.+1/(29*31*33)=如何解答