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