9.89-9.89×0.89简便计算?
7个回答
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9.89-9.89×0.89
=9.89×(1-0.89)
=9.89×0.11
=9.89×0.1+9.89×0.01
=0.989+0.0989
=1.0879
望采纳~
=9.89×(1-0.89)
=9.89×0.11
=9.89×0.1+9.89×0.01
=0.989+0.0989
=1.0879
望采纳~
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2022-08-11
展开全部
9.89-9.89×0.89
=(10-0.11)×(1-0.89)
=10*0.11-0.11*0.11
=1.1-0.0121
=1.0879
=(10-0.11)×(1-0.89)
=10*0.11-0.11*0.11
=1.1-0.0121
=1.0879
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