用简便方法计算.350×81+810×65 111×37+777×9
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用简便方法计算.350×81+810×65 111×37+777×9
用简便方法计算.350×81+810×65 111×37+777×9
用简便方法计算.350×81+810×65 111×37+777×9
350×81+810×65
=(350+650)*81=81000
111×37+777×9
=111*(37+7*9)=11100