0.999×1.3-0.111×2.7等于几?

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0.999×1.3-0.111×2.7等于几?

0.999×1.3-0.111×2.7等于几?
0.999×1.3-0.111×2.7等于几?

0.999×1.3-0.111×2.7等于几?
0.999×1.3-0.111×2.7
=0.111×9×1.3-0.111×2.7
=0.111×11.7-0.111×2.7
=0.111×(11.7-2.7)
=0.111×9
=0.999

0.999

0.999×1.3-0.111×2.7
=0.999×1.3÷9-0.111×2.7÷9
=0.111×1.3-0.111×0.3
=0.111×(1.3-0.3)
=0.111×1
=0.111

0.999×1.3-0.111×2.7等于0.999