如题所述
9+19.9+199.9+1999.9+19999.9
=10-1+20-0.1+200-0.1+2000-0.1+20000-0.1
=10+20+200+2000+20000-1-0.1-0.1-0.1-0.1
=22230-1.4
=22228.6
=10-1+20-0.1+200-0.1+2000-0.1+20000-0.1
=10+20+200+2000+20000-1-0.1-0.1-0.1-0.1
=22230-1.4
=22228.6
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第1个回答 2010-04-14
10+20+200+2000+20000
-1-0.1-0.1-0.1-0.1
=22230-1.4
=22228.6
-1-0.1-0.1-0.1-0.1
=22230-1.4
=22228.6