6.53×9.9+6.53的简便运算？
3个回答
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计算如下：
6.53×9.9+6.53
=6.53×(10-0.1)+6.53
=6.53×10-6.53×0.1+6.53
=65.3-0.653+6.53
=65.3+6.53-0.653
=71.83-0.653
=71.177
6.53×9.9+6.53
=6.53×(10-0.1)+6.53
=6.53×10-6.53×0.1+6.53
=65.3-0.653+6.53
=65.3+6.53-0.653
=71.83-0.653
=71.177
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