计算:121×0.13+12.1×0.9-12×1.21=_.
问题描述:
计算:121×0.13+12.1×0.9-12×1.21=______.
答
121×0.13+12.1×0.9-12×1.21
=12.1×1.3+12.1×0.9-12.1×1.2
=12.1×(1.3+0.9-1.2)
=12.1×1
=12.1.