0.89*100-0.89的简便方法计算

Question

如题所述

Answer 1

原题目应该是
0.89×101-0.89
=0.89×（101-1）
=0.89×100
=89
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Answer 2

0.89*100-0.89
= 89-0.89
= 88.11

0.89*101-0.89
= 0.89*(101-1)
= 0.89*100
= 89

Answer 3

＝89-0.89
＝88.11