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328 -99 = 328 -100 +1 = 228 +1 = 229


328Ê®99ÔõÑù¼ò±ãÔËËã

=(328-1)+100 =228+100 =328


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328¡Á99 =328¡Á9£¨100-1£©=328¡Á100-328 =32800-328 =32472


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328³ËÒÔ99ÒªÁÐËãʽ

=328x(100-1)=328x100-328x1 =3280-328 =2952


328*99 328ÔõÑù¼ò±ã¼ÆËã

328x99+328 =328x(99+1)=328x100 =32800


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