问题
解答题
化简：25.8xy-3xy+2xy-
|
答案
25.8xy-3xy+2xy-
xy+3 4
xy+xy1 2
=（25.8-3+2-
+3 4
+1）xy1 2
=25.55xy．
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化简：25.8xy-3xy+2xy-
|
25.8xy-3xy+2xy-
xy+3 4
xy+xy1 2
=（25.8-3+2-
+3 4
+1）xy1 2
=25.55xy．