35.7×9.9+3.57用简算怎么算=35.7x9.9+35.7x0.1=35.7x（9.9+0.1）=35.7x10=357
把35.7换成3.57×10就行
35.7×9.9+3.57=35.7×9.9+35.7×0.1=35.7×（9.9+0.1）=35.7×10=357
35.7×9.9+3.57=35.7x9.9+35.7x0.1=35.7x（9.9+0.1）=35.7x10=357
