Question

1.1×1.1×1.1－1.1×1.1－0.11 要用简便本方法

Answer 1

1.1×1.1×1.1－1.1×1.1－0.11=1.1×1.1×(1.1-1)-0.11=1.1×1.1×0.1-0.11=0.11×(1.1-1)=0.011

Answer 2

=1.1×(1.1×1.1-1.1-0.1)
=1.1×[1.1×(1.1-1)-0.1]
=1.1×(1.1×0.1-0.1)
=1.1×(0.11-0.1)
=1.1×0.01
=0.011