如题所述
第1个回答 2011-09-13
6.5×9.9+0.65
=6.5×9.9+6.5×0.1
=6.5×（9.9+0.1）
=6.5×10
=65
祝你开心
=6.5×9.9+6.5×0.1
=6.5×（9.9+0.1）
=6.5×10
=65
祝你开心
第2个回答 2011-09-13
6.5×9.9+0.65
=6.5×9.9+6.5×0.1
=6.5×（9.9+0.1）
=6.5×10
=65本回答被提问者采纳
=6.5×9.9+6.5×0.1
=6.5×（9.9+0.1）
=6.5×10
=65本回答被提问者采纳
第3个回答 2011-09-13
都是高手啊
