0.9999×1.3-0.1111×2.7的简便运算?

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0.9999×1.3-0.1111×2.7的简便运算?

0.9999×1.3-0.1111×2.7的简便运算?
0.9999×1.3-0.1111×2.7的简便运算?

0.9999×1.3-0.1111×2.7的简便运算?
0.9999×1.3-0.1111×2.7
=0.9999×1.3-0.1111×9×0.3
=0.9999×1.3-0.9999×0.3
=0.9999×(1.3-0.3)
=0.9999×1
=0.9999

(1-0.1)x1.3-0.1111x(3-0.3)=1.3-0.13-0.3333+0.03333=1.33333-0.46333=0.87