脱式计算0.65×9.9?
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可以用简便方法计算,把9.9转换为10-0.1
0.65×9.9
=0.65×(10-0.1)
=0.65×10-0.65×0.1
=6.5-0.065
=6.435
0.65×9.9
=0.65×(10-0.1)
=0.65×10-0.65×0.1
=6.5-0.065
=6.435
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通过观察,我们将9.9看成10-0.1进行脱式计算
0.65*9.9
=0.65*(10-0.1)
=0.65*10-0.65*0.1
=6.5-0.065
=6.435
脱式计算
0.65*9.9
=0.65*(10-0.1)
=0.65*10-0.65*0.1
=6.5-0.065
=6.435
脱式计算
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0.65*9.9
=0.65*(10-0.1)
=0.65*10-0.65
=6.5-0.65
=5.85
=0.65*(10-0.1)
=0.65*10-0.65
=6.5-0.65
=5.85
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0.65x9.9
=0.65x(10-0.1)
=0.65x10-0.65x0.1
=6.5-0.065
=6.435
=0.65x(10-0.1)
=0.65x10-0.65x0.1
=6.5-0.065
=6.435
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解:0.65×9.9
=0.65×(10-0.1)
=0.65×10-0.65×0.1
=6.5-0.065
=6.435
=0.65×(10-0.1)
=0.65×10-0.65×0.1
=6.5-0.065
=6.435
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已踩过<
评论
收起
你对这个回答的评价是?
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