3.82×9.9+0.382怎么用脱试简算

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3.82×9.9+0.382怎么用脱试简算3.82×9.9+0.382怎么用脱试简算3.82×9.9+0.382怎么用脱试简算幻の小希希,你好:3.82×9.9+0.382=3.82×9.9+3.82

3.82×9.9+0.382怎么用脱试简算
3.82×9.9+0.382怎么用脱试简算

3.82×9.9+0.382怎么用脱试简算
幻の小希希,你好:
3.82×9.9+0.382
=3.82×9.9+3.82×0.1
=3.82×(9.9+0.1)
=3.82×10
=38.2