7.85+2.34-0.85+4.86求简算!

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7.85+2.34-0.85+4.86求简算!
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7.85+2.34-0.85+4.86求简算!
7.85+2.34-0.85+4.86求简算!

7.85+2.34-0.85+4.86求简算!
=(7.85-0.85)+(2.34+4.86)
=7+7.2
=14.2

(7.85—0.85)+(2.34+4.86)=7+7.2=14.2