问题标题:
19.99×36-199.9×1,8+1999×0,82
问题描述:
19.99×36-199.9×1,8+1999×0,82
刘启宏回答:
=1999×0.36-1999×0.18+1999×0.82
=1999×(0.36-0.18+0.82)
=1999×1
=1999
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19.99×36-199.9×1,8+1999×0,82