12345乘以99999等于几
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![12345乘以99999等于几](/uploads/image/z/616624-16-4.jpg?t=12345%E4%B9%98%E4%BB%A599999%E7%AD%89%E4%BA%8E%E5%87%A0)
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12345乘以99999等于几
12345乘以99999等于几
12345乘以99999等于几
1234487655
把计算器放在手里,用锤子一砸,就出来了
1234487655
简便算法:
12345*99999
=12345*(100000-1)
=12345*100000-12345
=1234500000-12345
=1234487655
12345*99999=12345*(100000-1)=1234500000-12345
1+99999=100000
2+99998=100000.....
99999/2....