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82ⅹ403用四種方法解答？

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  • 1 # 使用者5525750891508

    (1)82x403

    =82Ⅹ(400十3)

    =82X400十82X3

    =32800十246

    =33046

    (2)82X403

    =(100一10一8)ⅹ403

    =403ⅹ100一403ⅹ10一403X8

    =40300一4030一3224

    =36270一3224

    =33046

    (3)82X403

    =(80十2)X403

    =80x403十2x403

    =32240十806

    =33046

    (4)82ⅹ403

    =41X2X403

    =(40十1)X806

    =40X806十806

    =32240十806

    =33046

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