如题所述
第1个回答 2016-06-20
0.78x101
=0.78x（100+1）
=0.78x100+0.78x1
=78+0.78
=78.78
谢谢，请采纳
=0.78x（100+1）
=0.78x100+0.78x1
=78+0.78
=78.78
谢谢，请采纳
第2个回答 2016-06-20
0.78x101
=0.78×100+0.78×1
=78+0.78
=78.78
=0.78×100+0.78×1
=78+0.78
=78.78
