Question

利用因式分解进行计算（过程）121×0.13+12.1×0.9-12×1.21

Answer 1

121×0.13+12.1×0.9-12×1.21

=12.1*10*0.13+12.1*0.9-12.1*0.1*12

=12.1*1.3+12.1*0.9-12.1*1.2

=12.1(1.3+0.9-1.2)

=12.1