9.81*0.1+0.5*98.1+0.049*981怎样简算

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9.81*0.1+0.5*98.1+0.049*981怎样简算9.81*0.1+0.5*98.1+0.049*981怎样简算9.81*0.1+0.5*98.1+0.049*981怎样简算9.81*0.

9.81*0.1+0.5*98.1+0.049*981怎样简算
9.81*0.1+0.5*98.1+0.049*981怎样简算

9.81*0.1+0.5*98.1+0.049*981怎样简算
9.81*0.1+0.5*98.1+0.049*981=9.81*0.1+9.81*5+9.81*4.9=9.81*﹙0.1+5+4.9﹚=9.81*10=98.1