如题所述
第1个回答 2020-06-16
307ⅹ29简便运算
(307ⅹ30)-(307ⅹ1)
=9210-307
=8903
(307ⅹ30)-(307ⅹ1)
=9210-307
=8903
第2个回答 2020-06-16
解:307x29
=(300+7)x(30-1)
=300x30-300X1十30X7-1X7
=9000-(300-210+7)
=9000--97
=8903本回答被网友采纳
=(300+7)x(30-1)
=300x30-300X1十30X7-1X7
=9000-(300-210+7)
=9000--97
=8903本回答被网友采纳