99*98简便计算
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99*98简便计算
99*98简便计算
99*98简便计算
99x98=(100-1)x98=100x98-1x98=9800-98=9702
(100-1)*(100-98)
=9702
99*98
=(98+1)98
=98*98+98
=9702
我不知道这二个算不算简便计算
嘿嘿
99*98
=(100-1)*98
=9800-98
=9700+100-98
=9700+2
=9702
(100-1)×98=9800-98=9702
99×98
=﹙100-1﹚×98
=9800-100+2
=9702
99x98
=100x98-98
=9800-98
=9702