第1个回答 2014-08-24
答：
9.9×23
=(10-0.1)×23
=10×23-0.1×23
=230-2.3
=227.7本回答被提问者采纳
9.9×23
=(10-0.1)×23
=10×23-0.1×23
=230-2.3
=227.7本回答被提问者采纳
第2个回答 2014-08-24
9.9×23
=【10-0.1】×23
=10×23-0.1×23......................（乘法的分配律）
=23-2.3
=20.7
第3个回答 2014-08-24
=(10－0.1)×23
=10×23－0.1×23
=230－2.3
=227.7
满意请采纳
=10×23－0.1×23
=230－2.3
=227.7
满意请采纳
第4个回答 2014-08-24
=(10-0.1)x23=230-2.3=227.7
第5个回答 2014-08-24
=23*(10-0.1)
=23*10-23*0.1
=230-2.3=227.7
=23*10-23*0.1
=230-2.3=227.7
9.9X23用脱试计算,要简便哦,还要写出过程,拜托各位数学答题高手,我很...
答：9.9×23 =(10-0.1)×23 =10×23-0.1×23 =230-2.3 =227.7
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