4.56 0.08-1.64用简便算怎么算
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4.56 0.08-1.64用简便算怎么算
4.56 0.08-1.64用简便算怎么算
4.56 0.08-1.64用简便算怎么算
4.56+0.08-1.64
=4+0.56+0.08-1-0.64
=(4-1)+(0.56+0.08)-0.64
=3+0.64-0.64
=3