Question

简便计算：1.1×1.1×1.1-1.1×1.1-0.11

Answer 1

1.1×1.1×1.1-1.1×1.1-0.11
=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）
=1.1×0.01
=0.011