3个回答
展开全部
40.095
解析:
4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.095
解析:
4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.095
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展开全部
4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.195
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.195
追答
4.05×9.9
=4.05×(10-0.1)
=4.05×10-4.05×0.1
=40.5-0.405
=40.095
不好意思,急中出错,40.095是对的~
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