Question

0.999×1.3－0.111×2.7等于几?

Answer 1

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