解:65×99+65
=65×99+65×1
=65×(99+1)
=65×100
=6500
看
你好 很高兴为你解答
65×65×99
=(60+5)×(60+5)×(100-1)
=(60+5)²×(100-1)
=(3600+600+25)×(100-1)
=4225×(100-1)
=422500-4225
=418275
你好😄答案如下:
65×99+65
=69×99+65×1
=69×(99+1)
=69×100
=6900
65×99+65
=65×(99+1)
=65×100
=6500