99.9*0.3怎样简算

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99.9*0.3怎样简算99.9*0.3怎样简算99.9*0.3怎样简算99.9×0.3=(100-0.1)×0.3=100×0.3-0.1×0.3=30-0.03=29.97

99.9*0.3怎样简算
99.9*0.3怎样简算

99.9*0.3怎样简算
99.9×0.3
=(100-0.1)×0.3
=100×0.3-0.1×0.3
=30-0.03
=29.97