代课老师的社保政策:299.911+0.99-0.98+0.97-0.96+0.95-0.94……+0.03-0.02+0.01=?
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299.911+0.99-0.98+0.97-0.96+0.95-0.94……+0.03-0.02+0.01=?
=299.911+0.01×50
=299.911+0.5
=300.411
原式=299.911+0.01×49+0.01
=300.411
300.411
1+1=原式
300.411