6.25×9.9+0.625 简便方法
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6.25×9.9+0.625 简便方法
6.25×9.9+0.625 简便方法
6.25×9.9+0.625 简便方法
6.25×9.9+0.625
=6.25×9.9+6.25 ×0.1
=6.25×(9.9+0.1)
= 62.5
6.25×9.9+0.625 简便方法
6.25×9.9+0.625 简便方法
6.25×9.9+0.625 简便方法
6.25×9.9+0.625
=6.25×9.9+6.25 ×0.1
=6.25×(9.9+0.1)
= 62.5