谢谢。求
1个回答
2015-03-29
展开全部
(7.4+3.6)×199.9-2×199.9+0.1×199.9
=(11-2)×199.9+0.1×199.9
=10×199.9-199.9+19.9
=1819
=(11-2)×199.9+0.1×199.9
=10×199.9-199.9+19.9
=1819
更多追问追答
追答
=2002²-2×2003×2006+2003²
=(2002-2003)²
=1
=(565²-434²)×11
=(565-435)(564+435)×11
=130×1000×11
=1430000
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