9.7+99.7+999.7+9999.7+99999.7简算

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9.7+99.7+999.7+9999.7+99999.7简算9.7+99.7+999.7+9999.7+99999.7简算9.7+99.7+999.7+9999.7+99999.7简算9.7+99.

9.7+99.7+999.7+9999.7+99999.7简算
9.7+99.7+999.7+9999.7+99999.7
简算

9.7+99.7+999.7+9999.7+99999.7简算
9.7+99.7+999.7+9999.7+99999.7
=(10-0.3)+(100-0.3)+(1000-0.3)+(10000-0.3)+(100000-0.3)
=(10+100+1000+10000+100000)-(0.3+0.3+0.3+0.3+0.3)
=111110-1.5
=111108.5