28.4*99+28.4简便计算
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28.4*99+28.4简便计算
=28.4x(99+1)
=28.4x100
=2840
希望能帮你忙,懂了请采纳,
28.4*99+28.4
=28.4*(99+1)
=2840
28.4*99+28.4简便计算
=28.4x(99+1)
=28.4x100
=2840
希望能帮你忙,懂了请采纳,
28.4*99+28.4
=28.4*(99+1)
=2840