简便计算72*99
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简便计算72*99
简便计算72*99
简便计算72*99
72*99
=72×(100-1)
=72×100-1×72
=7200-72
=7128
72x99
=72x100-72
=7200-72
=7128
72x99
=7200-72
=7128
简便计算72*99
简便计算72*99
简便计算72*99
72*99
=72×(100-1)
=72×100-1×72
=7200-72
=7128
72x99
=72x100-72
=7200-72
=7128
72x99
=7200-72
=7128