963×123-321×69 简便

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963×123-321×69 简便
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963×123-321×69 简便
963×123-321×69 简便

963×123-321×69 简便
963×123-321×69
=321×3×123-321×69
=321×369-321×69
=321×(369-69)
=321×300
=96300
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963×123-321×69
=963×123-321×3×23
=963×(123-23)
=96300

963×123-321×69
=963×123-321×3×23
=963×123-963×23
=963×(123-23)
=963×100
=96300

963×123-321×69
=3*321*123+321-69
=321*(3*123-69)
=321*(369-69)
=321*300
=(300+21)*300
=300*300+21*300
=90000+6300
=96300

963×123-321×69
=321×3×123-321×69
=321×(369-69)
=321×300
=96300