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计算:121×0.13+12.1×0.9-12×1.21=.

题目详情
计算:121×0.13+12.1×0.9-12×1.21=______.
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答案和解析
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.